I spent too much time browsing one day and I experienced flashes in my eyesight. I was concerned because I couldn't see properly and it took a while before they subsided.
Except for taking breaks in between which I should have done, what else can you suggest to avoid this and maybe eye damage?

Taking breaks is a good idea, but there are other things you can do. Make sure to have lights on while you're looking at your computer, it isn't such a shock for your eyes. Also, don't forget to take breaks and stretch out your body as well, because it can cause muscle tightness and things like that throughout your body.

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-Brittany Brydahl

I read in TOI that taking small breaks after every 10mins decreases chance of reaching straining threshold of eye. I find sprinkling eyes with water relaxes them & provides lubrication. (Don’t forget to clean hands & use drinking water). One of ophthalmologist also said that using water rather than eye lubricants is much safer in long term use.

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Feminism is an entire world view or gestalt, not just a laundry list of woman's issues.

I wonder how good those eye drops really are for you. I've heard that they aren't good for them, but then they always make my eyes feel much better. I've been trying to not be on the computer in the dark, but it's just something that i don't think about most the time.

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-Brittany Brydahl

There is some risk in a long term to use any kind of eye drops. It is better make only the water baths - make sure the water is somewhat cold.

Also adjust the brightness and contrast of your screen. The difference for your eyes will be significant.
Try to decrease the brightness and compensate it by increasing the contrast. Initially it can look too dark to you but, if make make the adjustment in several steps you will get used with it quickly. For example my brightness is 11/100 and contrast is 76/100. This is only for illustration of course - you have to find your best values.

Some LCD screen have a setting called Phase or something similar. Start changing and you will notice the image on the screen to become sharper or blurred. Find the value that makes your image sharper (especially noticeable for text) .

Also check your light sources - do you have direct exposure to sunlight or light bulb? If so, change the direction of your screen to eliminate it.

The breaks are essential. Use a software to remind you and take them regularly.

Eye drops are not recommended for everyday use. Drops are good once in a while, but too much use may infect your eyes.

Better, you adjust your screen resolution, brightness and contrast or have your screen with UV protection.