PSYCH 2E03 Lecture Notes - Vitreous Body, Aqueous Humour, Anterior Segment Of Eyeball
12 Jun 2013
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Normal or emmetropic eye: no problem in terms of diffraction. Hepermetropia far sight or hyperopia: eye ball is shorter causing image to fall behind the retina, hold objects further away, convex lens = converging lens. Myopia or short sight: longer than focal lens, image falls in front of the retina, corrected with concave = diverging lens. Astigmatism: when the focal points of different curvatures of the eye do not meet at one point, the image appears broken. Vertical and horizontal and oblique curvatures are not the same. Blur zone: horizontal and vertical light rays have different focal points. Astigmatism dial: ask which lines they can"t see clearly. Cylindrical lens and contact lens for astigmatism contact lens, and alternative for irregular astigmatism cornea becomes irregular in shape corneal mapping. Posterior segment contains vitreous humor (or vitreous body) Behind lens and cilliar body posterior segment: vitreous humour. Everything in front of the lens: anterior segment containing aqueous humor.
