This paper shows that the resolving power of the retina of the human eye when any type of cataract is present can be determined by means of a He-Ne laser retinometer (λ=633 nm). The results of a measurement of the retinal visual acuity of more than two hundred patients with various types of cataract before extraction of the crystalline lens and after replacement and the determination of the corresponding correction coefficient, reaching 0.7-0.9, make it possible to use the laser retinometer for pre-operative diagnosis.
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