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Published byNatalie Burke Modified over 9 years ago
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Types of refraction
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Clinical classification of myopia
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Principle of correction of hyperopia
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Myopia of low degree Under (-) 3.0 diopters Myopia of moderate degree From (-) 3.0 to (-) 6.0 diopters Myopia of high degree Higher than (-) 6.0 diopters
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Hyperopia of low degree Under (+) 2 diopters Hyperopia of moderate degree From (+)2 to (+) 5 diopters Hyperopia of high degree Higher than (+) 5 diopters
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Complications of hypermetropy Accomodative astenopy Sty, Conjunctivitis, Blefaritis. Pseudoneuritis Concomitant convergent strabismus
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Complicated myopia Myopic cone Myopic staphyloma External squint Hemorrhages in vitreous Intraretinal hemorrhages Retinal detachment
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Posterior staphyloma in the beginning myopia Myopic cone
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Scimitar tear of ocular choroid Tear of ocular choroid
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Druses of vitreous lamina Tear of ocular choroid
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True staphyloma of sclera at myopia of high degree Choroiditis at myopia
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Ocular fundus at myopia of high degree Ocular fundus at myopia of high degree
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Hemorrhage in the macula at myopia of high degree Macular pigmentation in place of older recurrent hemorrhages at myopia of high degree
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ILLUSTRATED REVIEW OF LASIK TECHNIQUE With the help of mechanic instrument – microkeratom – a round flap is opened in the protective layer of cornea.
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Upper layers of corneal stroma are evaporated by eximer laser on the necessary for accurate focusing depth. ILLUSTRATED REVIEW OF LASIK TECHNIQUE
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In the result of operation the form of cornea became planer. Saved natural layer provides quick rehabilitation of patient.
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1.SPECTACLES AND CONTACT LENSES 2.SURGICAL INTERVENTION 3. LASER CORRECTION Refractive errors correction
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SHORT VISION RECOVERY PERIOD POSSIBILITY TO MAKE SURGERY ON BOTH EYES SIMULTANEOUSLY STABLE POSITIVE RESULT LASIC ADVANTAGES
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CORNEAL SURFACE BEFORE AND AFTER LASIK
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ADVANTAGES: POSSIBILITY TO CORRECT MYOPIA UP TO 5 DIOPTERS DISADVANTAGES: LONG REHABILITATION PERIOD RISK OF DEVELOPMENT OF WRONG ASTIGMATISM RADIAL KERATOTOMY
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Many scientists made attempts to use light beam in ocular diseases. The first to realize this idea was Myer-Schwickerath in 1947. This date may be considered as the beginning of clinical use of photocoagulation in ophthalmology. Meyer-Schwickerath used xenon lamp of high pressur as a powerful source of light. LASER OPHTHALMOLOGY
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Thank you for attention!
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