. Refraction and muscular imbalance, as simplified through the use of the ski-optometer. 3-C — Supplementary spherical disk. By means of a concealed tooth gear, an innerdisk is automatically picked up, placing itsfirst lens + in position (Fig. 3b). This+ spherical lens remains stationarywhile the outer disk again revolves, addingto it the original +.25, +.50, +.75 and +, [3] Refraction and Muscular Imbalance. Fig. 4—With the reappearance of 00 at sphere indicator, a rapid increase or decrease of + is accurately and speedily attained, the latter totalling + At this poin
. Refraction and muscular imbalance, as simplified through the use of the ski-optometer. 3-C — Supplementary spherical disk. By means of a concealed tooth gear, an innerdisk is automatically picked up, placing itsfirst lens + in position (Fig. 3b). This+ spherical lens remains stationarywhile the outer disk again revolves, addingto it the original +.25, +.50, +.75 and +, [3] Refraction and Muscular Imbalance. Fig. 4—With the reappearance of 00 at sphere indicator, a rapid increase or decrease of + is accurately and speedily attained, the latter totalling + At this point, theinstrument again automatically picks up itsinner disk, thereby placing its second lens,+, in position. Instead of using intermediate strengths inmaking an examination, it is frequently desir-able to make such extended changes as With the Ski-optometer, the re-fractionist will note that two white zeros ap-peared at the spherical register in connectionwith +, and again with + A rapidoutward turn of the spherical reel toward thetemporal side to the point of the reappearanceof the two zeros will show +; or, if in-creased power is still desired, a rapid turn willdraw+ into position (Fig. 4). [4] Refraction and Muscular Imbalance Turning the reel inward toward the nasalside will likewise decrease its convex brief, each one of these lenses, showingtheir foci in conjunc
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Keywords: ., bookcentury1900, bookdecade1920, bookidrefractionmu, bookyear1921
