Exam (elaborations)
Optician Practical Exam Study Material | 134 Questions with 100 % correct answers | verified
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a lens focal length may be altered by? - changing the curvature of one surface what controls the amount of light that enters the eye? - Iris lights changing direction as it passes from one medium to another is called what? - refraction meniscus, equiconcave and flat concave are all, what? - minu...
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