SO-801 Hand-Held Slit Lamp
User Manual
3.
Check the eyepiece setting. The eyepiece consists of two optical
elements, and is designed for very high image quality. The eyepiece
is adjustable for the refractive error of the user. To adjust the
eyepiece, first move the slit lamp so that the slit itself is focussed
sharply on a white surface. (The slit image is formed approximately
40 mm from the eyepiece.)
Look through the eyepiece. Rotate the eyepiece cell to move it
forwards or backwards in its thread until the slit is clear. Take care
not to touch the surface of the eyepiece lens.
The eyepiece lens is already correctly adjusted for an emmetrope
when shipped from Scan Optics. For a myope, the eyepiece cell
should be further forward (that is, the eyepiece lens should be closer
to the slit image). For a hypermetrope, the lens barrel should be
further back from the slit image. The amount of adjustment needed is
approximately 1.3 mm for each D of refractive error.
Version 6.0
Page 6 of 12
