Purpose: To investigate a quantitative method to measure decentration distance(DD) and analyze the DD of four kinds of intraocular lenses (IOLs).
Methods: The pseudophakic eye photos were taken under the slit lamp after the IOLs were implanted a year or longer. Then the images were inputted into a computer and the Photoshop software was applied to analyze the DD. Four kinds of IOLs were analyzed, including AcrySof MA60BM (11 eyes), Allergan SA40N (11 eyes), AcrySof SA60AT/SA30AL (5 eyes), Corneal Quattro (4 eyes).
Results: The mean value of DD was (0.2643 +/- 0.1574) mm in the AcrySof MA60BM group, (0.3536 +/- 0.1719) mm in the Array SA40N group, (0.3099 +/- 0.1529) mm in the SA60AT/SA30AL group, and (0.3261 +/- 0.1877) mm in the Quattro group. The difference of the DD values among these 4 kinds of IOLs had no statistic significance (F = 0.506, P = 0.681) and the values were not equal to zero (t = 10.508, P < 0.001).
Conclusion: The Photoshop method is a simple and efficient way for DD analysis. The modern foldable posterior-chamber-IOLs have good centration performances when implanted into the capsular bags.