Noninvasive Diagnostic Techniques in Ophthalmology

pp 438-450

Scanning Laser Ophthalmoscope

  • Robert H. Webb

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Ophthalmoscopes are telescopes for viewing the inside of the eye. In effect, this means that the objective lens (or mirror) is of longer focal length than the ocular element which is used to inspect the image formed by the objective. This constraint is then further complicated by the geometry of the eye—a “black body” with a small viewing window covered by a partial reflector. An alternative view might be that the ophthalmoscope is a microscope for which the objective is the eye’s cornea and lens, although that is a better description of a slit lamp.