Pupil size and axial length affect near vision

Small pupil size and short axial length predict good near vision after phacoemulsification and monofocal IOL implantation, claims the latest study in the Journal of Refractive Surgery.

The retrospective study, conducted by Dr D.H. Limet al., Department of Ophthalmology, Samsung Medical Centre, Seoul, Korea, involved 84 eyes of 84 patients who underwent cataract surgery with monofocal IOL implantation from October 2009 to April 2010. Eyes were identified as having good or poor near vision. Factors recorded included age, sex, IOL movement, axial length, pupil size, degree and type of astigmatism, IOL type, total aberration and higher-order aberrations (HOAs).

Good near vision was classified in 34 eyes and 50 eyes had poor near vision. All groups had a postoperative uncorrected visual acuity of more than 0.2 logMAR and a refractive error within ± 0.5 D of spherical equivalent.

Pupil size smaller than 2.6 mm and an axial length of less than 23.0 mm were inversely correlated with good near vision, compared to larger measurements after monofocal IOL implantation.

To read the abstract please click here.