Assessment of visual acuity (VA) has been shown to vary between tests, which may be attributable in part to test inaccuracies, such as a change in the distance between the chart and subject. Therefore ...

And now a page from our "Sunday Morning" Almanac, January 18th, 1908, 107 years ago today . . . the day the Dutch ophthalmologist Herman Snellen died at the age of 73. You may not recognize his name, ...

A new study shows potential for eye tests to be conducted easily and affordably using a smartphone app. An app to test eyesight easily and affordably using a smartphone is as accurate as traditional ...

The chart priced at $2,200 has a metal lamp visor and a linen scroll with letters of different sizes. There doesn’t seem to be any type of antique that isn’t sold at auctions, flea markets or shops.

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. An inscription reads “SEITZ TEST ...

The aim of the study was to compare the performance of two different COMPlog computerised, single letter scoring, visual acuity (VA) measurements against gold standard Early Treatment Diabetic ...