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The introduction of new condensing lenses for fundus examination
1Halpern Eye Associates, Dover, DE 19901.
Background:
Examination of the inner eye is an important part of any comprehensive eye examination. There are a number of instruments used for examination of the ocular fundus; each has its advantages and disadvantages. Many of these instruments rely on hand-held lenses of which there are a number of options.
Methods:
A doublet design lens consisting of two aspheric, plano-convex lenses, which have their convex sides facing toward each other and are separated by an air space, was evaluated and compared with other commercially available condensing lenses.
Results:
A + 13.5 and +16 diopter doublet lens can be a valuable lens for binocular indirect ophthalmoscopy when compared with currently available, commercially available lenses.
Conclusions:
Innovative designs in lenses used with binocular indirect ophthalmoscopy may add considerably to the enhancement of the examination of the ocular fundus.