Revolving eye-testing chart

Revolving drum for eye-testing, Snellin-type chart with four faces each which has a different test type

Details

Category:
Ophthalmology
Collection:
Sir Henry Wellcome's Museum Collection
Object Number:
A606429
Measurements:
overall: 500 mm x 149 mm x 149 mm, 2.35 kg
type:
test types
credit:
Loan, Wellcome Trust