The distance vision drum carries graded optotypes on a rotating cylinder for simple distance acuity testing. Lightweight and power-free, it suits screening camps and basic clinic use.
Ophthalmic Instruments
Distance Vision Drum
Rotating distance vision test drum presenting graded optotypes for distance visual-acuity screening.
| Type | Rotating optotype drum |
|---|---|
| Content | Graded distance optotypes |
| Construction | Drum on stand/handle |
| Use | Acuity screening |
Applications
- Distance visual-acuity screening
- School and field vision camps
- Quick acuity checks