NVCC 1999-2000 Catalog
    Description of Courses

OPT - Optician

OPT 221 (4 CR.)
OPTICAL THEORY IV

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    Studies axes of the eye, PD measurement and measuring instruments, Listing's Plane, visual acuity, tilted lens effect,     crossed cylinders, vertex distance compensation. Teaches corrected curve theory, magnification of spectacle lenses,     definition and classification of presbyopia, existence of accommodation, formula for accommodation, and     accommodation/convergence ratio. Lecture 4 hours per week.
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