Objective: To improve near stereopsis in pseudophakic eyes after phacoemulsification and implantation of posterior chamber intraocular lens (IOL).
Methods: This prospective case-series study comprised 92 eyes of 46 patients aged 50 to 70 years [mean age (61.33 +/- 5.54) years] who had phacoemulsification and implantation of posterior chamber IOL, including 24 unilateral pseudophakia (Group A) and 22 bilateral pseudophakia (Group B). The accommodative amplitude, relative accommodation, reading addition, near stereoacuity, etc. were measured. All data were analyzed with the SPSS11.0 for Windows.
Results: (1) The mean value of monocular accommodative amplitude in the group A and group B was (2.05 +/- 1.12) and (2.35 +/- 1.30) D, respectively. (2) In the group A and group B, the binocular add was (2.08 +/- 0.37) and (2.13 +/- 0.46) D, respectively, and the monocular add was (2.20 +/- 0.42) and (2.01 +/- 0.39) D, respectively. There was a significant difference between the binocular add and the monocular add (t = 2.33, 2.20, P<0.05) , and between left monocular add and right one (t =3.70, 5.02, P<0.01) in each group. (3) The near stereopsis with monocular add was better than that with binocular add in each group, the difference was significant (X2 = 6.46, 7.02, P = 0.04, 0.03).
Conclusion: Monocular add is beneficial to a pseudophakia with posterior chamber IOL implantation to improve near stereopsis.