2. Types of refraction

3. Clinical classification of myopia

4. Principle of correction of hyperopia

8. 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

9. Hyperopia of low degree Under (+) 2 diopters Hyperopia of moderate degree From (+)2 to (+) 5 diopters Hyperopia of high degree Higher than (+) 5 diopters

10. Complications of hypermetropy Accomodative astenopy Sty, Conjunctivitis, Blefaritis. Pseudoneuritis Concomitant convergent strabismus

11. Complicated myopia Myopic cone Myopic staphyloma External squint Hemorrhages in vitreous Intraretinal hemorrhages Retinal detachment

14. Posterior staphyloma in the beginning myopia Myopic cone

15. Scimitar tear of ocular choroid Tear of ocular choroid

16. Druses of vitreous lamina Tear of ocular choroid

17. True staphyloma of sclera at myopia of high degree Choroiditis at myopia

18. Ocular fundus at myopia of high degree Ocular fundus at myopia of high degree

19. Hemorrhage in the macula at myopia of high degree Macular pigmentation in place of older recurrent hemorrhages at myopia of high degree

20. ILLUSTRATED REVIEW OF LASIK TECHNIQUE With the help of mechanic instrument – microkeratom – a round flap is opened in the protective layer of cornea.

21. Upper layers of corneal stroma are evaporated by eximer laser on the necessary for accurate focusing depth. ILLUSTRATED REVIEW OF LASIK TECHNIQUE

22. In the result of operation the form of cornea became planer. Saved natural layer provides quick rehabilitation of patient.

23. 1.SPECTACLES AND CONTACT LENSES 2.SURGICAL INTERVENTION 3. LASER CORRECTION Refractive errors correction

24. SHORT VISION RECOVERY PERIOD POSSIBILITY TO MAKE SURGERY ON BOTH EYES SIMULTANEOUSLY STABLE POSITIVE RESULT LASIC ADVANTAGES

25. CORNEAL SURFACE BEFORE AND AFTER LASIK

26. ADVANTAGES: POSSIBILITY TO CORRECT MYOPIA UP TO 5 DIOPTERS DISADVANTAGES: LONG REHABILITATION PERIOD RISK OF DEVELOPMENT OF WRONG ASTIGMATISM RADIAL KERATOTOMY

27. 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

28. Thank you for attention!