THE EFFECT OF ND YAG LASER POSTERIOR CAPSULOTOMY SIZE ON REFRACTION AND INTRAOCULAR PRESSURE IN PSEUDO PHAKIC PATIENTS

*Dana Jamal Roqieh, Mahmoud Rajab and Afraa Salman

ABSTRACT

Objective: To study the effect of Nd YAG Laser Posterior Capsulotomy Size on refraction error-intraocular pressure and anterior chamber depth in patients with pseudophakia. Study Type: prospective comparative study. Methods: The study sample included 50 patients (50eyes) with posterior capsule opacification following phacoemulsification cataract surgery, the average age was 58.75±10.9 (range 45-75 years). Detailed medical history was taken and all patients underwent detailed ophthalmic examination including the measurement of refraction errors. BCVA, spherical equivalent calculation, intraocular pressure measurement and anterior chamber depth was assessed by ultrasound bio microscopy before and after Nd YAG laser Posterior capsulotomy procedure at 1week,1month, and 3months.The subjects were divided into two groups based on the size of PCO capsulotomy: Group1(3-4)mm and Group2(4.1-5)mm. Results: our study showed improvement in corrected distance visual acuity in both large and small PCO capsulotomy groups with no statistically significant differences between the two groups. Hyperopic shift was observed in both groups with higher shift noted in the large PCO capsulotomy group. Intraocular pressure increased significancy in both groups during the first week post –procedure but remained within normal upper limits accompanied by changes in anterior chamber depth with greater increase observed in group2. No macular edema or retinal detachment occurred in both groups during the follow-up period. Conclusion: Nd YAG laser posterior capsulotomy in patients with pseudophakia improves corrected distance visual acuity and induces hyperopic shift particularly in larger capsulotomy group with intraocular pressure elevation with normal limits during the first week post procedure and increased anterior chamber depth especially in the larger capsulotomy group.

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