. Refraction and how to refract : including sections on optics, retinoscopy, the fitting of spectacles and eye-glasses, Fig. 138. Fig. 139. Authors Mirror with Folding 138.—Showing central light C, on small mirror B. This is the light thepatient sees when looking into the mirror, and corresponds in size to theone-centimeter j)pening in screen. D is the folding cap handle to pro-tect B when not in use. A is the metal 139.—Shows the light moved to one side as a result of tilling the mirror. The patient //n/s^ Jiavc his accojiiinodatioii under the in-fluence of a relia
. Refraction and how to refract : including sections on optics, retinoscopy, the fitting of spectacles and eye-glasses, Fig. 138. Fig. 139. Authors Mirror with Folding 138.—Showing central light C, on small mirror B. This is the light thepatient sees when looking into the mirror, and corresponds in size to theone-centimeter j)pening in screen. D is the folding cap handle to pro-tect B when not in use. A is the metal 139.—Shows the light moved to one side as a result of tilling the mirror. The patient //n/s^ Jiavc his accojiiinodatioii under the in-fluence of a reliable cyclopleoic; this is imperative. Eacheye is tested separately, and if the patient has a squint, thenone eye should be covered while its fellow is being patient must be comfortably seated and told to look at RETINOSCOPV. 157 the metal disc of the mirror or the observers foreheadabove the mirror, and never into the mirror. The Retinoscope, or Mirror.—The plane mirror is 2cm. in diameter on a round 4 cm. metal disc, with a 2 at the center, made by removing the silvering,and not by cutt
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Keywords: ., bookcentury1900, bookdecade1900, bookidref, booksubjecteyeglasses
