How is cataract diagnosed?
A cataract is diagnosed by a regulated health professional. It can be observed in the lens of the eye with a hand-held ophthalmoscope or biomicroscope.
Cataracts are usually graded (0-4) on their density and the type is noted. Sometimes dilating eye drops are required to better assess the type of cataract.
There is a danger in attributing vision loss solely to cataract without a full eye exam. The eye is complex and often has concurrent issues (e.g. macular degeneration + cataract). Only a full exam can sort out if vision loss is 100% attributable to cataract development.