¿1,3375 index?
Ciencia y Tecnología para la Salud Visual y Ocular

Abstract

To convert the measurements obtained from the corneal surface into dioptric value, the B&L keratometer uses the general lens formula (n’-n/R) and assumes an n’ of 1,3375 (compared to the actual corneal refractive index of n’=1,376). This is a fictional value, which includes an allowance for the small, yet significant, negative power of the posterior corneal surface.
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Keywords

index of refraction
keratometer
ophthalmometer
cornea
anterior surface
posterior surface

How to Cite

Merchán de Mendoza, G. . (2009). ¿1,3375 index?. Ciencia Y Tecnología Para La Salud Visual Y Ocular, 7(2), 79-85. https://doi.org/10.19052/sv.1061