Long-term change in intraocular pressure after extracapsular cataract extraction with posterior chamber intraocular lens implantation versus phacoemulsification with posterior chamber intraocular lens implantation in Indians

ABSTRACT

The purpose of the study is to evaluate the long-term changes in intraocular pressure [IOP] after extracapsular cataract extraction [ECCE] with posterior chamber intraocular lens [PCIOL] implantation versus phacoemulsification with PCIOL implantation in otherwise normal cataract patients in India. The study was conducted in the Department of Ophthalmology, King George's Medical College, Lucknow between August 2000 and August 2001. One hundred and seventeen eyes of 115 patients were included in the study. 84 patients were randomly selected for ECCE with PCIOL implantation [ECCE group] and 31 patients were selected for phacoemulsification with PCIOL implantation [Phaco group]. IOP was measured pre-operatively and post-operatively, from the 1[st] month to the 12 [th] month. Statistical significance was indicated by P < 0.05. There was a mean fall in IOP of 2.70 mm Hg [19.74%] in the ECCE group and 2.74 mm Hg [20.57%] in the phaco group. The decrease in the mean post-operative IOP from baseline was statistically significant [P < 0.01] at the end of 2 months in both groups. There was no statistically significant difference in post-operative IOP at any visit between groups [P > 0.05, all post-operative visits]. After 4[th] monthpost-operatively, the IOP was mostly stable, but it was significantly lower than the pre-operative IOP. Significant IOP reduction may be expected after cataract surgery with either ECCE or phacoemulsification with IOL implantation. The lowering of IOP became statistically significant at about 2 months post-operatively, but became almost stable after the 4[th] month