Transparent cover, Refracts light entering eye - Cornea, Controls size of pupil - Iris, Captures Image - Retina, Changes the focal length of lens - Ciliary muscles, Near sightedness - Myopia, Minimum distance of distinct vision - Near point (25cm), Controls amount of light entering eye - Pupil, Converges light at Retina - Lens, Range of Human eye - 25cm to infinity, Causes- focal length long, Image behind retina, Spectrum - Band of seven colours, Least deviated colour(longest wavelength) - Red, Dispersion - Splitting of light into its component colours, Angle of deviation - angle between incident and emergent ray,

Human Eye

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Gaya visual

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