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This overview highlights key aspects of cataract surgery, focusing on how light is refracted by the eye's structure, including the cornea, lens, iris, retina, and optic nerve. It outlines two primary surgical techniques: Phacoemulsification, involving a small 2.8 mm incision, where a phaco probe is used to emulsify and remove the cataract lens, and Extracapsular Cataract Extraction (ECCE), which requires a larger 12 mm incision for manual lens removal. The section emphasizes the importance of intraocular lenses post-surgery and the differences in techniques.
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The ‘Normal’ Eye Iris Retina Cornea Optic Nerve Lens
Light is refracted (or bent) by the cornea and lens Image focuses on the retina A clear image is seen
SCATTERING OF LIGHT Cataract causes Scattering of light
INSCISION 2.8 mm OPENING
INSCISION 2.8 mm OPENING
INTRAOCULAR LENS 13 mm 6 mm
LENS FOLDED 3 mm
Extra Capsular Cataract Extraction ECCE Old or Conventional Surgery