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9 Jun 2016 It lies roughly 23-24mm temporal to the optic disc, and 18.5mm nasally.2 . negative lenses, such as that developed by Hruby in the 1940s has 12 Dec 2017 LENSES IN OPHTHALMOLOGY Dr. Reshma Peter. CONVEX LENS CONCAVE LENS +60D +78D +90D HRUBY LENS GOLDMANN 3 Double aspheric lenses Optics of indirect fundus biomicroscopy is similar to that of 21 Nov 1975 The Hruby lens is also advantageous for examination of the region the microscope in order to examine vitreous and fundus in optical section. The answers will appear in the November issue of Dispensing Optics. The closing Hruby lens is placed as close as . www.academy.org.uk/tutorials/volklen. 10 Sep 2013 17 Sep 2013 Principle: Placing a negative lens in front of the eye creates an optical system analogues to a Galilean telescope. Hruby lens biomicroscopy (Erect image). Optical consn·aints of tl1e instrument and the eye to be examined pre vent useful visualization of although this topic is beyond tl1e scope of this manual. Parts of the Slit Lamp . Hruby lens for examining the fundus. These are not shown in Dial up a +10DS lens in the lens wheel and observe the eye from 10cm. By moving along a blood vessel in this manner the optic disc will be located. monocular indirect, modified monocular indirect and Hruby lens direct ophthalmoscopy.1 Nov 2003 Any fundus (Hruby, gonio, 90D, 78D or 20D) lens, when used with the refracting elements of This is the optical system designed to view the image produced by the fundus lens/cornea system. A lesson in MIOs and BIOs.