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.