Glaucoma drops lower the pressure inside the eye to protect the optic nerve. They do not improve vision, and you may not feel any difference, but using them every day as prescribed is the most important thing you can do to keep your sight.
| Group (usual cap colour) | Examples | Common side effects |
|---|---|---|
| Prostaglandins (teal) | Latanoprost, travoprost, bimatoprost; once at night | Red eye, longer darker lashes, darkening of the iris (permanent) and eyelid skin |
| Beta-blockers (yellow) | Timolol | Can slow the pulse and worsen asthma: tell your doctor about heart or breathing problems |
| Alpha-agonists (purple) | Brimonidine | Allergy with red itchy eyes, dry mouth, tiredness; not for young children |
| Carbonic anhydrase inhibitors (orange) | Dorzolamide, brinzolamide | Stinging, bitter taste |
| Rho-kinase inhibitors | Netarsudil | Redness, small bleeds on the white of the eye |
| Combinations (dark blue if they contain a beta-blocker) | Two drugs in one bottle | As for each drug; fewer drops to remember |
Cap colours follow an American system and are not always the same in India; always read the label. See eye drop cap colour codes.
Use it when you remember, unless it is nearly time for the next dose. Do not double up.
Usually yes, unless laser or surgery controls the pressure. Never stop without advice.
Mild redness is common with some drops. Speak to your doctor; there are alternatives and preservative-free options.
Remove lenses before drops and wait 15 minutes before putting them back, unless the drop is preservative-free.
Related: Glaucoma Clinic in Ahmedabad: Tests, Drops & Laser, Glaucoma Laser: SLT and Iridotomy, Types of Eye Drops Explained.
This leaflet gives general information and does not replace advice from your own eye doctor. Reviewed by Dr. Dhaval Patel, MD (Ophthalmology, AIIMS New Delhi), November 2026.
Sadbhaav Eye & Dental Clinic, Motera, Ahmedabad. Dr. Dhaval Patel, MD (AIIMS New Delhi). Monday to Saturday, 10 am to 1 pm and 5 pm to 8 pm. For a serious eye injury outside clinic hours, go to the nearest eye hospital or emergency department.
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