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It appears that you be a suspect for glaucoma. It is common to see a defect in the visual field test
and change in eye pressure with or without significant change in your actual vision. In glaucoma, the nerve that helps you see is damaged due to one or more reasons, including persisting higher than normal eye pressure (greater than 20) for a prolonged period without controlling it. After the first time this occurred, when you had headaches and high eye pressure, the doctors should have follow-up with you closing and monitor eye pressure and visual field. It is often necessary to repeat the visual field test and re-check the eye pressures to confirm or make the diagnosis. After you next test, if the results still show these changes, then the doctor may start you on an eye drop to reduce the pressure a little bit more.
In general, about 20% of the people with glaucoma do not have eye pressure greater than 20, however, it may still be necessary to slightly decrease their eye pressure to about 60-70% of the original value. The cause of the glaucoma in such cases of less than 20 eye pressure may be more of genetic or due to other unknown factors. I suggest that you continue to follow-up with your eye doctor, and feel free to share this discussion with your eye doctor.
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