Why is perimetry important in glaucoma?
Glaucoma destroys the fibers of the optic nerve gradually, starting from the periphery. Central vision remains high for a long time, and a person does not notice that the field of vision is narrowing - losses are detected when about half of the nerve fibers have already been lost. Perimetry reveals these defects objectively and allows you to track them over time: it is based on its results that they evaluate whether intraocular pressure is sufficiently effectively reduced. The study is also used for diseases of the optic nerve, retina and brain pathologies.
Why do you need hardware diagnostics?
An examination by an ophthalmologist gives a high-quality picture, while hardware methods provide accurate numbers. They allow us to track the dynamics: whether myopia is progressing, whether the field of vision is narrowing with glaucoma, whether the length of the child’s eye has changed over the year.
Some data cannot be obtained at all during a routine examination - for example, the condition of the retina with a cloudy lens or the exact length of the eyeball for calculating an artificial lens.
Basic methods
- autorefractometry - objective measurement of eye refraction
- computer perimetry - study of visual fields
- Ultrasound biometry (A-scan) – measurement of eye length and structures
- Ultrasound examination of the eye (B-scan) - a picture of the internal environments and retina