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ANISOMETROPIA

ANISOMETROPIA. Dr Cynthia arunachalam Professor and Head Dept of ophthalmology Yenepoya Medical College Yenepya university. Anisometropia. Equal refraction in the two eyes is isometropia Unequal refraction in the two eyes is anisometropia 1D difference = 2% difference in size of images

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ANISOMETROPIA

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  1. ANISOMETROPIA Dr Cynthia arunachalamProfessor and HeadDept of ophthalmologyYenepoya Medical CollegeYenepya university

  2. Anisometropia • Equal refraction in the two eyes is isometropia • Unequal refraction in the two eyes is anisometropia • 1D difference = 2% difference in size of images • 2.5 D anisometropia = 5% aniseikonia can be tolerated • Maximum – 4D = 8% aniseikonia

  3. Etiology • Congenital & developmental • Acquired uniocularaphakia IOL power undercorrected /overcorrected trauma refractive surgery

  4. Clinical types • Simple anisometropia • Compound anisometropia • Mixed anisometropia • Simple astigmatic anisometropia • Compound astigmatic anisometropia

  5. Effects of anisometropia • Binocular single vision • Uniocular vision – anisometropic amblyopia • Alternate vision

  6. Treatment • Spectacles – up to 4 D • Contact lens - >4 D anisometropia • Aniseikonic glasses • Surgery – IOL implantation Phakic IOL • Refractive Corneal Surgery

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