The HandyRef-K / HandyRef is lightweight and also has excellent weight distribution. Its compact design makes it easy to hold, balance, and use. Intelligently designed button layout is also useful in ...
Four times the diagnostic capabilities in one-fourth the space. The all new TRK-1P 4-in-1 instrument combines the latest technology into one compact unit. The TRK-1P features a complete Auto Alignment ...
Shin Nippon Accuref K 9001 Auto Refractometer Operations Manual ...
Background Mutations in the L/M cone opsin gene array cause abnormally high perceived retinal contrast and the development of myopia. Environmental factors may also lead to high visual contrast and ...
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