> ## Content Index > Fetch the complete content index at: https://projectorsplace.com/llms.txt > Use this file to discover other available public pages before exploring further. # Best Eye Drops for Pollen for Seasonal Allergy Sufferers - URL: https://projectorsplace.com/best-eye-drops-pollen/ - Published: 2026-09-07T06:58:17.000Z - Updated: 2026-09-07T09:49:23.000Z - Description: Seven allergy eye drops compared for pollen season, from an 8-hour olopatadine option to a 24-hour once-daily bottle, with the profile that suits each one. - Author: Elsie Duncan - Tags: Allergy, Sinus & Asthma, Allergy Relief, Eye Care The best eye drops for pollen are the Opcon-A Allergy Eye Drops, a twin pack of 0.5 fl oz bottles that pairs an antihistamine with a redness reliever for the specific itchy-plus-red combination pollen triggers. If you'd rather dose once and forget, the Pataday Once Daily Allergy Eye Drops carry a 0.2% olopatadine formula the manufacturer says lasts up to 16 hours. Seven bottles are compared here, and the deciding specification is duration, not brand. Get that call right and the rest is preference. In this guide 1. [Best eye drops for pollen at a glance](#best-eye-drops-for-pollen-at-a-glance) 2. [How I screened the shortlist](#how-i-screened-the-shortlist) 3. [1\. Opcon-A Allergy Eye Drops — Best overall](#1-opcon-a-allergy-eye-drops-%E2%80%94-best-overall) 4. [2\. Pataday Once Daily Allergy Eye Drops for Itchy Eyes — Best premium](#2-pataday-once-daily-allergy-eye-drops-for-itchy-eyes-%E2%80%94-best-premium) 5. [3\. Bausch+Lomb Advanced Eye Relief Eye Drops — Runner-up](#3-bauschlomb-advanced-eye-relief-eye-drops-%E2%80%94-runner-up) 6. [4\. Zaditor Systane Eye Itch Relief Antihistamine Eye Drops — Best minimal setup](#4-zaditor-systane-eye-itch-relief-antihistamine-eye-drops-%E2%80%94-best-minimal-setup) 7. [5\. Pataday Twice Daily Allergy Eye Drops — Best for pros](#5-pataday-twice-daily-allergy-eye-drops-%E2%80%94-best-for-pros) 8. [6\. Lastacaft Once Daily Eye Allergy Itch Relief Drops — Best for beginners](#6-lastacaft-once-daily-eye-allergy-itch-relief-drops-%E2%80%94-best-for-beginners) 9. [7\. Glenmark Therapeutics Olopatadine Eye Drops for Allergies — Best budget pick](#7-glenmark-therapeutics-olopatadine-eye-drops-for-allergies-%E2%80%94-best-budget-pick) 10. [8, 16 or 24 hours: which duration do you actually need?](#8-16-or-24-hours-which-duration-do-you-actually-need) 11. [What the active ingredient tells you](#what-the-active-ingredient-tells-you) 12. [Contacts, kids and other fine print](#contacts-kids-and-other-fine-print) 13. [How long does one bottle last?](#how-long-does-one-bottle-last) 14. [The verdict](#the-verdict) 15. [FAQ](#faq) ## Best eye drops for pollen at a glance | Pick | Active ingredient | Duration (claimed) | Price | | -------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------- | ------------------ | -------------------------------------------------------------------- | | **Best overall**[Opcon-A Allergy Eye Drops](https://www.amazon.com/dp/B003DH541M?tag=projplace-20) | Antihistamine + redness reliever | Not stated | [Check Price](https://www.amazon.com/dp/B003DH541M?tag=projplace-20) | | **Best premium**[Pataday Once Daily Allergy Eye Drops for Itchy Eyes](https://www.amazon.com/dp/B0857X5V2S?tag=projplace-20) | Olopatadine 0.2% | Up to 16 hours | [Check Price](https://www.amazon.com/dp/B0857X5V2S?tag=projplace-20) | | **Runner-up**[Bausch+Lomb Advanced Eye Relief Eye Drops](https://www.amazon.com/dp/B0DJTZH6NM?tag=projplace-20) | Olopatadine 0.2% | Up to 16 hours | [Check Price](https://www.amazon.com/dp/B0DJTZH6NM?tag=projplace-20) | | **Best minimal setup**[Zaditor Systane Eye Itch Relief Antihistamine Eye Drops](https://www.amazon.com/dp/B00119SZOW?tag=projplace-20) | Antihistamine (ketotifen claim) | Not stated | [Check Price](https://www.amazon.com/dp/B00119SZOW?tag=projplace-20) | | **Best for pros**[Pataday Twice Daily Allergy Eye Drops](https://www.amazon.com/dp/B0857XKR3Z?tag=projplace-20) | Olopatadine 0.1% | Up to 8 hours | [Check Price](https://www.amazon.com/dp/B0857XKR3Z?tag=projplace-20) | | **Best for beginners**[Lastacaft Once Daily Eye Allergy Itch Relief Drops](https://www.amazon.com/dp/B0C69WYZTM?tag=projplace-20) | Alcaftadine (Rx-strength claim) | Up to 24 hours | [Check Price](https://www.amazon.com/dp/B0C69WYZTM?tag=projplace-20) | | **Best budget pick**[Glenmark Therapeutics Olopatadine Eye Drops](https://www.amazon.com/dp/B0D462ZTLX?tag=projplace-20) | Olopatadine 0.1% | Up to 8 hours | [Check Price](https://www.amazon.com/dp/B0D462ZTLX?tag=projplace-20) | ## How I screened the shortlist Seven bottles went into the comparison. I pulled every specification and every manufacturer claim into one sheet, then sorted by the two figures that actually separate these drops: the active ingredient and the duration the label promises. Three groups fell out cleanly: 1. **Once-daily olopatadine 0.2%.** Pataday Once Daily and Bausch + Lomb Advanced Eye Relief. Same active, same 16-hour claim, different bottle sizes. 2. **Twice-daily olopatadine 0.1%.** Pataday Twice Daily and the Glenmark generic. Same active, same 8-hour claim, meaningful gap in price position. 3. **Everything else.** Opcon-A's antihistamine-plus-redness combination, Zaditor's antihistamine formula, and Lastacaft's alcaftadine with a 24-hour claim. That grouping is the whole point. If two products carry the same active ingredient at the same strength and the same duration claim, the deciding factors are bottle size, dosing preference and price position. The three outliers each solve a different problem, and one of them is the pick that suits pollen specifically. Note on the keyword: Amazon's search returns general allergy eye drops here rather than pollen-specific formulas. Every bottle on this list names pollen among the allergens it targets, but none is labelled a pollen-only product. Read the active ingredient, not the marketing. ## 1\. Opcon-A Allergy Eye Drops — Best overall **Opcon-A is the pick for pollen season because it treats the two symptoms pollen actually causes: itch and redness.** [![Opcon-A twin pack of 0.5 fl oz allergy eye drop bottles — the only pick here that pairs an antihistamine with a redness reliever](https://m.media-amazon.com/images/I/51SSM208PXL._SL500_.jpg)](https://www.amazon.com/dp/B003DH541M?tag=projplace-20) **Best for:** pollen-season itch paired with red eyes **Skip it if:** you want once-daily dosing Pollen doesn't just itch. It reddens the whites of the eye by dilating surface vessels, and the olopatadine and ketotifen formulas on this list only address the itch. Opcon-A is the sole pick that combines an antihistamine with a redness reliever, so it targets both symptoms with one drop. Opcon-A says the formula is clinically proven to relieve redness and itching caused by allergens including pollen, ragweed, grass and animal dander. The set-count case is strong too. This is a pack of 2 at 0.5 fl oz per bottle, which is more volume than any other pick here. Total dimensions are 3.4 x 2.6 x 1.1 in and weight is 2.08 oz, so both bottles fit a small bag. Price position is entry, second-cheapest of the seven, and it's the one buyers reach for most often in this set by a wide margin. The trade-off: no duration figure on the label and no once-daily option, so plan on multiple doses through the day. **Pros:** - Antihistamine plus redness reliever in one drop - Twin pack of 0.5 fl oz bottles, the largest fill here - Entry price position, second-cheapest of seven - Names pollen, ragweed, grass and dander on the label - The category's fastest-selling pick in this set **Cons:** - No published duration figure - No once-daily formulation - Not intended for contact lens use as directed - Older 2010 formulation compared to the newer olopatadine bottles [Check Price on Amazon](https://www.amazon.com/dp/B003DH541M?tag=projplace-20) ## 2\. Pataday Once Daily Allergy Eye Drops for Itchy Eyes — Best premium **One drop in the morning, done for the day: Pataday Once Daily is the pick when a bathroom detour at lunchtime is not on the cards.** [![Pataday Once Daily twin pack of 2.5 mL bottles with 0.2% olopatadine — one-drop-per-day dosing](https://m.media-amazon.com/images/I/41lyrfYXQoL._SL500_.jpg)](https://www.amazon.com/dp/B0857X5V2S?tag=projplace-20) **Best for:** long workdays with one morning dose **Skip it if:** redness is your main complaint The active ingredient is olopatadine at 0.2%, twice the strength of the twice-daily bottles further down. Pataday says the formula works in minutes and lasts up to 16 hours from a single drop. Size is 2.5 mL per bottle, sold as a pack of 2, and the outer carton measures 3.75 x 2 x 1.25 in at 18.1 g. Approved for adults and children aged 2 and up. Price position is premium: this is the most expensive pick in the set. What the extra spend buys is the once-daily schedule and the twin-bottle configuration, which is useful if you want one at home and one in a bag. Where it loses to Opcon-A is redness. This is an antihistamine, not a redness reliever, so bloodshot whites will still be bloodshot even when the itch is gone. If pollen leaves your eyes looking as bad as they feel, choose accordingly. **Pros:** - 0.2% olopatadine, the once-daily strength - Up to 16 hours per drop, per the label - Pack of 2 at 2.5 mL each - Approved for ages 2 and up - Fast onset claim, "works in minutes" **Cons:** - Highest price position in the set - Antihistamine only, no redness reliever - Small 2.5 mL bottle drains quickly at daily use - Contacts must come out 10 minutes before dosing [Check Price on Amazon](https://www.amazon.com/dp/B0857X5V2S?tag=projplace-20) ## 3\. Bausch+Lomb Advanced Eye Relief Eye Drops — Runner-up **Same active ingredient as the Pataday Once Daily bottle, in a smaller single-bottle format at a mid price position.** [![Bausch + Lomb Advanced Eye Relief 0.12 fl oz bottle with 0.2% olopatadine — the compact once-daily option](https://m.media-amazon.com/images/I/41hMNuo9u-L._SL500_.jpg)](https://www.amazon.com/dp/B0DJTZH6NM?tag=projplace-20) **Best for:** once-daily relief in a compact bottle **Skip it if:** you want a larger fill Bausch + Lomb's Advanced Eye Relief carries olopatadine 0.2%, the same active ingredient as the Pataday Once Daily pick above. The manufacturer says it starts working in minutes and lasts up to 16 hours per drop. Bottle size is 0.12 fl oz, weight 2.83 g, sold as a single. Colour is clear. This is the same clinical proposition as the premium pick, in a smaller and cheaper package. Price position is mid, one step below Pataday Once Daily. The trade-off is bottle count and volume: you get one 0.12 fl oz bottle here rather than two 2.5 mL bottles. If pollen season runs three weeks for you, that's fine. If it runs three months, the maths tilts toward the twin pack. Bausch + Lomb says the formula matches the efficacy of the original prescription-strength version, and the ingredient list backs the claim. **Pros:** - 0.2% olopatadine, same active as Pataday Once Daily - Up to 16 hours per drop, per the label - Mid price position, below the Pataday twin pack - Compact 0.12 fl oz bottle for a bag or drawer - From a brand with 150 years in eye care per the listing **Cons:** - Only 0.12 fl oz per bottle - Sold as a single, no travel spare - No redness reliever included - Slowest seller of the olopatadine options here [Check Price on Amazon](https://www.amazon.com/dp/B0DJTZH6NM?tag=projplace-20) ## 4\. Zaditor Systane Eye Itch Relief Antihistamine Eye Drops — Best minimal setup **A single 5 mL bottle of prescription-strength antihistamine, for pollen days that come and go.** [![Zaditor Systane 5 mL antihistamine eye drop bottle — the minimal single-bottle option](https://m.media-amazon.com/images/I/41fUOA2wGfL._SL500_.jpg)](https://www.amazon.com/dp/B00119SZOW?tag=projplace-20) **Best for:** occasional pollen flare-ups **Skip it if:** symptoms run all day Zaditor Systane is a 0.17 fl oz (5 mL) bottle at 5.67 g, sized 3.8 x 1.9 x 1.1 in. The listing calls the formula prescription-strength and pitches it at itch caused by pollen, ragweed, grass and animal dander. No duration figure is given on the specification sheet. This is the simplest option in the set: one bottle, one active ingredient, one job. Price position is entry, third-cheapest of the seven. Only one seller lists it, which means less flexibility if the primary listing changes. What it misses against the olopatadine picks is a published hours-of-relief claim, so if you need to plan a dose around a workday, the Pataday and Bausch + Lomb bottles give you a number to work with and this one does not. Contacts must come out 10 minutes before dosing, per the listing. **Pros:** - Prescription-strength antihistamine per the listing - Full 5 mL bottle for regular use - Entry price position - Names the main pollen-season allergens on the label - Straightforward single-bottle format **Cons:** - No published duration in the specification sheet - Only one seller stocks it - No redness reliever included - Not for contact lens use as directed [Check Price on Amazon](https://www.amazon.com/dp/B00119SZOW?tag=projplace-20) ## 5\. Pataday Twice Daily Allergy Eye Drops — Best for pros **The original olopatadine 0.1% formula for readers who prefer the twice-daily schedule and the brand behind it.** [![Pataday Twice Daily 5 mL bottle of 0.1% olopatadine allergy eye drops](https://m.media-amazon.com/images/I/51Gw2YUVTmL._SL500_.jpg)](https://www.amazon.com/dp/B0857XKR3Z?tag=projplace-20) **Best for:** morning-and-evening dosers who like the original olopatadine **Skip it if:** you keep forgetting the second dose Pataday Twice Daily is a 0.17 fl oz (5 mL) bottle of olopatadine at 0.1%, half the strength of the once-daily version and dosed twice per day. Pataday says one drop works in minutes and lasts up to 8 hours. The bottle measures 3.25 x 1.75 x 1.25 in. Approved for adults and children aged 2 and up. Twice-daily olopatadine has a following for a reason: two smaller doses can feel steadier through a long pollen day than one big morning drop. The catch is you have to remember the evening dose, and the price position is still premium here, well above the Glenmark generic that carries the same active ingredient at the same 0.1% strength. The case for spending more is the Pataday name and packaging; the case against is that the label calls out the same allergens, the same 8-hour duration and the same twice-daily schedule. **Pros:** - Prescription-strength 0.1% olopatadine per the label - Up to 8 hours per drop, twice daily - 5 mL bottle, a comfortable season's supply for many users - Approved for ages 2 and up - Widely recognised formulation **Cons:** - Requires a second dose to cover a full day - Priced well above the generic with the same active - Small 5 mL fill drains faster with twice-daily dosing - No redness reliever included [Check Price on Amazon](https://www.amazon.com/dp/B0857XKR3Z?tag=projplace-20) ## 6\. Lastacaft Once Daily Eye Allergy Itch Relief Drops — Best for beginners **One drop, 24-hour claim, no schedule to learn: the easiest way into daily allergy drops.** [![Lastacaft Once Daily 0.17 fl oz allergy eye drops bottle — 24-hour claim with alcaftadine](https://m.media-amazon.com/images/I/41qegG05+DL._SL500_.jpg)](https://www.amazon.com/dp/B0C69WYZTM?tag=projplace-20) **Best for:** first-time users who want one drop a day **Skip it if:** you want the cheapest way in Lastacaft uses alcaftadine rather than olopatadine, which makes it the only pick here with that active. The listing says relief starts in as little as 3 minutes and lasts up to 24 hours from a single drop, and calls the formula prescription-strength available over the counter. Bottle size is 0.17 fl oz (5 mL) at 17.7 g. Lastacaft describes each bottle as a 60-day supply and notes it is FSA and HSA eligible. For a first-time buyer, that 60-day figure is genuinely useful: it tells you what to expect from a single bottle rather than leaving you guessing. Price position is premium, and this is the slowest seller of the seven, so it lives further off the beaten path than the Pataday and Opcon-A options. The 24-hour claim is the longest published duration in the set, which is either a compelling upgrade over 16 hours or a marginal one depending on how your eyes react by evening. **Pros:** - Longest duration claim in the set, up to 24 hours - One drop per day - 60-day per-bottle supply figure on the listing - FSA and HSA eligible per the listing - Fast onset claim, "as little as 3 minutes" **Cons:** - Premium price position - Slowest seller of the seven picks here - Only 0.17 fl oz per bottle - Alcaftadine is less familiar than olopatadine [Check Price on Amazon](https://www.amazon.com/dp/B0C69WYZTM?tag=projplace-20) ## 7\. Glenmark Therapeutics Olopatadine Eye Drops for Allergies — Best budget pick **Same 0.1% olopatadine as Pataday Twice Daily, at the cheapest price position in the set.** [![Glenmark Therapeutics 5 mL bottle of 0.1% olopatadine allergy eye drops — the budget alternative to Pataday Twice Daily](https://m.media-amazon.com/images/I/41D8J7IQDXL._SL500_.jpg)](https://www.amazon.com/dp/B0D462ZTLX?tag=projplace-20) **Best for:** twice-daily dosing on a tight budget **Skip it if:** you want a longer-duration formula Glenmark's bottle is 9 g at 2.95 x 1.57 x 1.77 in, and the label states olopatadine HCl 0.1% as the active ingredient. Glenmark explicitly points to the comparison in the listing, saying to compare to the active ingredient of Pataday Twice Daily Relief. Dosing is one drop in the affected eye twice daily, and duration is up to 8 hours. The listing names pollen, ragweed, grass and dander. Price position is entry, the cheapest of the seven, and the case is simple: if you're happy with the twice-daily schedule, this is the same active ingredient at the same strength for less. The trade-offs are the ones you'd expect from a value pick. The specification sheet is thinner than the brand-name bottles, no released date is given, and this is the second-slowest seller in the set. None of that changes what's in the bottle. **Pros:** - Same 0.1% olopatadine as the Pataday twice-daily formula - Cheapest price position in the set - Names pollen, ragweed, grass and dander on the label - Up to 8 hours per drop, per the listing - Straightforward twice-daily schedule **Cons:** - Thinner specification sheet than the brand-name options - Requires two doses per day - No redness reliever included - Slower-selling than the mainstream bottles [Check Price on Amazon](https://www.amazon.com/dp/B0D462ZTLX?tag=projplace-20) ## 8, 16 or 24 hours: which duration do you actually need? Duration is the deciding specification in this category, and the labels give you three tiers to choose from. Match the tier to your day, not the brand. - **Up to 8 hours (twice daily).** Pataday Twice Daily and the Glenmark generic. Best if your pollen exposure is bunched into a morning outdoor block and an evening one, with a chance to redose. Both use olopatadine 0.1%. - **Up to 16 hours (once daily).** Pataday Once Daily and Bausch + Lomb Advanced Eye Relief. Best for a standard workday from wake-up to bedtime. Both use olopatadine 0.2%. - **Up to 24 hours (once daily).** Lastacaft, with alcaftadine. Best if you want the drop to still be working when you head back outside the next morning. A short rule of thumb: if you're often outside more than 16 hours after your morning dose, you either want the 24-hour claim or a top-up drop. Under 16 hours and awake, the middle tier does the job. Under 8 hours of exposure and you have redness too, the case for Opcon-A gets stronger, because the redness reliever is doing work the antihistamines cannot. ## What the active ingredient tells you The bottles on this list come down to four active-ingredient stories. **Olopatadine 0.1%** is the twice-daily antihistamine, in Pataday Twice Daily and the Glenmark generic. It blocks histamine at the eye and needs redosing after roughly 8 hours per the label. **Olopatadine 0.2%** is the once-daily version, at double the strength, in Pataday Once Daily and Bausch + Lomb Advanced Eye Relief. Same mechanism, longer coverage. **Alcaftadine** is a different antihistamine, in Lastacaft, with the longest duration claim in the set at up to 24 hours. **Antihistamine plus redness reliever** is the Opcon-A combination. The redness reliever is the reason Opcon-A alone tackles bloodshot whites, and it's why the pick sits at number one for pollen specifically. Zaditor sits between these groups: an antihistamine, with a prescription-strength claim, and no published duration figure. If your itch is mild and occasional, that thinner spec sheet is a fair trade for a small bottle and an entry price. If itch and redness both flare hard on high-pollen days, the combination formula does more work per drop. ## Contacts, kids and other fine print Four of these labels tell you what to do about contact lenses, and the guidance is consistent. 1. **Remove contacts before dosing.** Pataday Once Daily, Pataday Twice Daily and Zaditor all say so on the listing. 2. **Wait at least 10 minutes after use before reinserting.** Same three labels, same figure. 3. **Ages 2 and up.** Both Pataday bottles are approved for adults and children aged 2 years and older per the listings. 4. **Read the box.** Opcon-A, Bausch + Lomb Advanced Eye Relief, Lastacaft and Glenmark do not spell out contact and paediatric guidance in the same detail here, so check the packaging directly. That's the rule for daily wearers: dose, wait ten, reinsert. Build that gap into your morning if you're using a once-daily olopatadine bottle, and into both slots of the day if you're on a twice-daily schedule. If your child has pollen-related eye itch, the two Pataday bottles are the ones with an explicit age floor in this set; anything younger than 2, or any concurrent eye condition, is a conversation for a pharmacist or physician rather than a roundup. ## How long does one bottle last? Bottle size and dosing schedule together decide how many days a single bottle covers, and the numbers here vary more than the brands suggest. - **Opcon-A**: pack of 2 at 0.5 fl oz each. The largest total volume in the set. - **Zaditor Systane**: 0.17 fl oz (5 mL), single bottle. - **Pataday Twice Daily**: 0.17 fl oz (5 mL), single bottle, dosed twice a day. - **Pataday Once Daily**: 2.5 mL bottles, pack of 2, dosed once a day. - **Bausch + Lomb Advanced Eye Relief**: 0.12 fl oz, single bottle, dosed once a day. - **Lastacaft**: 0.17 fl oz (5 mL), single bottle, and the listing calls it a 60-day supply. - **Glenmark**: 9 g bottle, dosed twice a day. Two things to notice. Twice-daily bottles drain roughly twice as fast per mL of fill as once-daily bottles, so a 5 mL twice-daily bottle covers fewer days than a 5 mL once-daily one. And a pack-of-two configuration lets you leave one at home and carry one, which the single bottles do not. If pollen season in your area runs weeks rather than months, most of these last it out. If it runs months, favour the larger fills or the twin packs. ## The verdict If you want the shortest useful answer: buy Opcon-A for pollen-season itch with redness, and buy Pataday Once Daily if you'd rather dose once and get on with your day. That's the split, and the cutoff is whether your eyes look as bad as they feel. Opcon-A wins the top slot because pollen produces two symptoms and this is the only bottle in the set that treats both. Antihistamine plus redness reliever, twin pack of 0.5 fl oz bottles, entry price position, and the fastest-selling pick in the group by a clear margin. The trade-off is dosing frequency: there's no once-daily version and no published hours-of-relief figure, so you'll top up through the day. Pataday Once Daily is the alternate pick when your day cannot accommodate a mid-afternoon dosing stop. Olopatadine 0.2%, up to 16 hours per drop per the label, twin pack of 2.5 mL bottles, approved for ages 2 and up. If price is the main constraint and you'll accept the twice-daily schedule, the Glenmark generic carries the same 0.1% olopatadine as Pataday Twice Daily at the cheapest price position in the set. Three products, three clear roles. ## FAQ ### Are the best eye drops for pollen the same as general allergy drops? The best eye drops for pollen on Amazon are general allergy eye drops that name pollen as one of the allergens they target, rather than pollen-specific products. Every pick on this list calls out pollen, ragweed, grass and dander. Read the active ingredient and the duration figure on the label, because those decide the fit, not the marketing on the front of the box. ### Is Opcon-A worth it compared to Pataday Once Daily? Opcon-A is worth it if your pollen symptoms include red eyes as well as itch, because it's the only pick in this set that combines an antihistamine with a redness reliever. Pataday Once Daily is worth it if you want a single morning drop with a 16-hour duration claim and don't need help with bloodshot whites. They solve different problems, and price position pushes Opcon-A lower. ### What is the difference between olopatadine 0.1% and 0.2% here? The difference between olopatadine 0.1% and 0.2% in this set is dosing schedule and duration. The 0.1% strength, in Pataday Twice Daily and the Glenmark generic, is dosed twice a day and the label claims up to 8 hours per drop. The 0.2% strength, in Pataday Once Daily and Bausch + Lomb Advanced Eye Relief, is dosed once a day with an up-to-16-hour claim. ### Can I wear contact lenses with these drops? Wearing contact lenses with these drops means taking them out first. Pataday Once Daily, Pataday Twice Daily and Zaditor all state on their listings that you should remove contacts before use and wait at least 10 minutes before reinserting. For Opcon-A, Bausch + Lomb Advanced Eye Relief, Lastacaft and Glenmark, check the packaging directly, because the specification sheets here don't spell out the contact guidance. ### Lastacaft vs Pataday Once Daily: which pollen drop lasts longer? Lastacaft vs Pataday Once Daily is a duration question with a simple answer. Lastacaft's listing claims up to 24 hours from one drop of alcaftadine, and Pataday Once Daily's listing claims up to 16 hours from one drop of olopatadine 0.2%. Lastacaft has the longer duration figure, but it sits at a premium price position and is the slowest seller of the seven picks in this comparison. Pollen season rewards preparation more than reaction. Pick the bottle before the count climbs, keep it where you'll actually use it, and match the duration on the label to the shape of your day. If you're not sure where to start, Opcon-A covers the itch-plus-redness case that pollen specifically produces, and it does so at an entry price position with the largest total volume in the group. Buy that first if you want one bottle that handles most pollen days, then step up to a 16-hour or 24-hour once-daily formula if a mid-day redose keeps catching you out. Two calls, and pollen season gets shorter. *Last updated: September 8, 2026\. Product availability re-checked.* *This page contains affiliate links. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.*