The Study Of Contrast Sensitivity Function In Post-operative Senile Cataract Patients

Objective: To observe contrast sensitivity function recovery in post-operative senile cataract patients. And to discuss the influencing factors to recovering.Methods: Applying controlling investigations method, experimental group: 47 cases (60 eyes) were operated with ECCE + PMMA (PMMA group) or Phaco +silicon –gelatum (silicon–gelatumgroup) lens implantation. Controlling group: aged matching volunteer of 19 cases 30 eyes, eliminating ophthalmology disease. The patients and the volunteer were examined for their corrected distant, near ision, refractive power and contrast sensitivity in three months postoperation.Results: The corrected visual acuity between two experimental groups were not statistically significant before operation(P>0.05).Comparing to the controlling group, there were no statistical differences between two experimental groups in corrected distant, near vision (P>0.05).The cylinder anisometropia in PMMA group was worse than silicon–gelatum group and controlling group, the differences were significant(P<0.05).Contrast sensitivity vision examination of postoperation: the curves of 19 eyes in PMMA group were in normal limits. the curves of 26 eyes in silicon–gelatum group were in normal limits, however the curves of 29 eyes in controlling group were in normal limits. The contrast sensitivity numeric value in high frequency was significant different between experimental groups and controlling group(P<0.05), controlling group was superior to experimental group. There were significant different between PMMA group and silicon–gelatum group in high frequency(P<0.05), silicon–gelatum group was superior to PMMA group.Conclusion: Compared to the aged matching physio-crystal eyes,contrast sensitivity vision was still defective in senile cataract patients. Too high astigma degree and the worse astigmatism may affect the recovery of contrast sensitivity vision .