Ocular Maxlight (CR-39) 90 Diopter Slit Lamp Indirect Ophthalmoscopy Lenses

Ocular 90D Slit Lamp Lenses
Ocular 90D Slit Lamp Lenses
Item# OI-STD

Due to a long-term backorder an available alternative would be the Ocular MaxField (Glass) 90D Indirect Lens. see link MaxField below.
Holding Ring: 

The Ocular Standard 90D Slit Lamp Lens is the most popular power for non-contact fundus examination. The aspheric CR-39 Maxlight 90D lens is available with standard holding ring, or large holding ring (OI-STD-LR). Ocular's 90 diopter lenses are supplied in solid walnut carrying case.

Please also see the Ocular MaxField (Glass) 90D slit lamp indirect ophthalmoscopy lenses.