Lenses for indirect ophthalmoscopy

Ophthalmic aspheric lenses 15D, 20D, 30D, 40D, 60D, 78D, 90D are designed for noncontact ophthalmoscopy of the eye ground providing a high-resolution image of the retina pattern. Lenses are placed between the doctor’s ophthalmoscope and the patient’s eye, the image is formed between the lens and the eye of the doctor, the magnification of the image depends on the focal length of the lens.
Ophthalmic lenses operating conditions: temperature range from + 10 °С to + 35 °С, relative humidity is not more than 80% at 25 °С.
The service life of ophthalmic lenses is at least 10 years.

Specifications:

Model Overall dimensions, mm Clear aperture,

mm

 Focal length,

mm

 Max. weight,

g
LO 15D Ø62 х 14,5 52 65,5 55
LO 20D Ø58 х 16,4 48 50,5 52
LO 30D Ø46 х 11 36 33,4 40
LO 40D Ø42 х 11,1 32 24,9 35
LO 60D Ø34 х 12 26 16,7 27
LO 78D Ø34 х 14,5 26 12,9 33
LO 90D Ø27 х 12,3 19 11,2 17