Patient's question:
The ratio of cups to dishes is c/d = 0.8. I wonder if exceeding 1.0 would result in blindness?Doctor's answer:
Hello!From the information you provided, it can be observed that there is extensive damage to the nerve fiber layer below the optic nerve, corresponding to visual field damage. These are classic signs of glaucoma. For mid-stage or progressive glaucoma, intraocular pressure (IOP) reduction treatment requires the establishment of strict target IOP levels. It is recommended that you adhere to the medication for glaucoma. The initial target IOP should be a 30% reduction from your baseline IOP without medication. Based on this judgment, Alphagan is suitable.
Of course, the best way to measure intraocular pressure is to use the Goldmann tonometry. However, due to limited conditions, many regions cannot perform Goldmann tonometry. If the hospital can measure both Goldmann tonometry and non-contact tonometry simultaneously, it is possible to measure both and identify the differences. This way, even if non-contact tonometry is used in the future, it can be relatively calibrated.
C/D 1.0 indeed represents optic atrophy and should be avoided.
Fluctuations in visual field tests are normal and are also common in the United States. When I was in the U.S., I found that glaucoma visual field tests there required six measurements to assess the overall condition of the visual field. Moreover, visual field fluctuations tend to worsen as the disease progresses. It is recommended that you undergo visual field tests every three months.