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Comparison of Corneal and Ocular Higher-Order Aberrations Between Young and Old Populations 

Comparison of Corneal and Ocular Higher-Order Aberrations Between Young and Old Populations  . Prof. Mounir Khalifa Dr. Ihab Osman Horus Vision Correction Center Alexandria, Egypt Chicago-ASCRS 2008. Financial Disclosure. I have financial interest related to this paper. Aim of the Work.

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Comparison of Corneal and Ocular Higher-Order Aberrations Between Young and Old Populations 

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  1. Comparison of Corneal and Ocular Higher-Order Aberrations Between Young and Old Populations  Prof. Mounir Khalifa Dr. Ihab Osman Horus Vision Correction Center Alexandria, Egypt Chicago-ASCRS 2008

  2. Financial Disclosure I have financial interest related to this paper

  3. Aim of the Work • The study aims at evaluating the corneal and ocular HOA’s(mainly coma and spherical aberrations) in individuals younger than 30 years and those older than 50 years to demonstrate the effect of aging on the corneal and internal HOA’s. • The study is composed of two groups ; Group I younger than 30 years ( 60 eyes) and group II older than 50 years(40 eyes). • Corneal and ocular WF analysis was done for both groups using SCHWIND ORK-CAM and statistical analysis (paired t-test) was done.

  4. Demographic DataGroup I Group II No significant difference between both groups in age, sex, and MRSE.

  5. COMA No significant difference between corneal coma of both groups and between ocular coma of both groups. Corneal WF Ocular WF

  6. Ocular coma was significantly higher than corneal coma in both groups Young(I) Old (II) P<0.001 P<0.003

  7. Spherical Aberration Corneal WF Ocular WF In young, 30% -ve, 70% +ve sph ab. In old, all +ve sph ab with significant increase Significant increase of +ve sph. Ab

  8. Spherical Aberration Young (I) Old (II) No significant difference Significant increase of +ve sph. Ab

  9. Conclusions & Recommendations Coma did not show significant difference between the two age groups, although total coma was significantly higher than corneal coma in both groups ( significant internal coma). The study showed no significant difference between corneal and ocular sph ab in young while in old age there was significant increase in +ve sph ab. The shift of sph ab to the +ve side in old age was found in all eyes over 50 years old because of the senile lenticular sclerosis. Recommendation: treatment of HOA’s in old age should depend on the corneal WF to exclude the internal changing factors (Lens).

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