Question
Main Symptoms: What causes an increase in the cup-to-disc ratio? Can it be prevented? Will it definitely not be cured if it has increased? Onset Time: Laboratory Test Results:
Answer
In addition to the cup-to-disc ratio examination, you also need to check the visual field and intraocular pressure. An increased cup-to-disc ratio is often seen in patients with glaucoma. An increased cup-to-disc ratio is often pathological, such as in glaucoma, which may lead to optic nerve atrophy and manifest as an increased cup-to-disc ratio. However, not everyone with a large cup-to-disc ratio is a glaucoma patient; some are called physiological large optic cups. These individuals have a very large cup-to-disc ratio but are not related to glaucoma and are considered normal. Physiological large optic cups are usually symmetrical between the two eyes, with normal intraocular pressure and visual field, and follow-up has not shown any progressive changes. Myopia, especially high myopia, can alter the appearance and color of the optic disc as well as changes in the retina and visual field examination, which may misdiagnose it as glaucoma. Detailed examinations are needed. Since the small depression in the optic disc is formed by the convergence of optic nerve fibers as they pass through the sieve hole, and optic nerve damage is irreversible, the cup-to-disc ratio does not get smaller.