“Each person’s glaucoma is unique,” writes Rohit Krishna, M.D. for the Glaucoma Research Foundation. To help make glaucoma patients’ next doctor appointment more beneficial, he provides answers to 9 commonly asked questions that can be used as conversation starters.*

9 commonly asked glaucoma questions

What should I do if I miss a scheduled time for an eye drop?

Krishna explains that taking eye drops consistently reduces eye pressure fluctuation and helps prevent progression of glaucoma. If a scheduled morning dose is missed, he recommends taking it later in the day; if a scheduled nighttime dose is missed, take it the next morning. Then, resume normal dosing even if the next dose is only a few hours after the last.

Can I take more glaucoma drops if my eyes feel dry?

No. Glaucoma medications may cause dry eyes themselves. More would only make matters worse, as well as deviate from the proper dosing schedule.

How does blood pressure affect eye pressure?

Eye pressure may rise when blood pressure suddenly rises, but the body will compensate by lowering eye pressure to maintain normality (homeostasis). That said, prolonged elevated blood pressure could decrease blood flow to the eye and worsen glaucoma.

What is my ideal eye pressure?

Ideal eye pressure is determined by a physician based on a patient’s unique history, eye exam, and test results. “Every individual has a unique pressure that is good for their eye,” says Krishna. A pressure of 29 may be causing no damage in one person, whereas another may be going blind from a pressure of 15. (Normal is considered 10-21.)

To save on drops, can I take them every two days?

No. Every medication is approved by the government based on specific dosing research. Patients should follow the specific directions on the label.

Should I not take my prescribed eye medication if it’s not covered by my insurance?

Patients may be able to substitute a prescribed medication that isn’t on their insurance plan’s list of “preferred” medications for a cheaper version. Common examples are Xalatan®, Travatan Z®, and Lumigan®. Patients should contact their doctor with the substitution information. It’s important to note, however, that just because a medication isn’t covered does NOT mean that it isn’t safe and effective.

Can I still take medication that says ‘don’t take if you have glaucoma’?

Certain common medications urge caution for people with glaucoma. People with closed-angle glaucoma, for instance, should avoid certain cold and cough medicines, as well as medications that treat urinary incontinence. Ask your doctor about any medications you’re unsure of, and tell them about any blurred vision, pain, headache, or nausea your medicines might be causing. 

Do I have to continue eye drops if my vision doesn’t improve?

Yes. The current goal in glaucoma therapy is to maintain, not improve, vision. Glaucoma often has no noticeable symptoms. Moreover, “[o]ne of the most important principles of glaucoma care is to treat the disease before the patient starts to notice the loss of vision,” states Krishna. “Taking your medication as prescribed to save your vision cannot be overemphasized.”

Can I be prescribed marijuana to help lower my pressure?

Despite many patients hearing of medical marijuana for glaucoma, research does not support its effectiveness at this time. Its effect on eye pressure is negligible and very short-lasting. This applies to its active ingredient (cannabinoids), as well.

*Krishna, R. (2022, April 19). Glaucoma FAQ: Answers to Your Questions. Glaucoma Research Foundation. https://glaucoma.org/glaucoma-faq-answers-to-your-questions

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