Ophthalmic ocular pinhole eye occluder – double ended style occluder with multi pinholes on one side, and opaque disk without holes on the other side - for visual acuity testing, ophthalmic and optometric exams.
Pinhole occluder is simply to focus light, temporarily removing the effects of refractive errors such as myopia.
Efficient tool for ophthalmologist, orthoptist or optometrist to distinguish visual defects caused by refractive error, and to estimate if corrective lenses is helpful for your eye vision.

Features:
Material: Durable Plastic
Dia. of Occlusion: approx. 2.4 inches
With Multiple Pinholes
Color: Black
Length: approx. 7.7 inches
Style: Double Ended