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G. A. Montenegro, P. Marvan, A. Dexl, G. Grabner, R. Barraquer, R. Michael; Posterior Capsule Opacification Assessment and Factors That Influence Visual Quality After Posterior Capsulotomy. Invest. Ophthalmol. Vis. Sci. 2010;51(13):5425.
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© ARVO (1962-2015); The Authors (2016-present)
To study the correlation of posterior capsule opacification (PCO) with measured intraocular straylight and visual acuity.
Visual acuity (VA) (logMAR) and intraocular straylight (C-Quant straylight parameter log[s]) were measured under photopic conditions before and 2 weeks after YAG capsulotomy in 53 eyes (41 patients). Photopic pupil diameter was measured. To document the amount of opacification, pupils were dilated and photographs were taken at a slit lamp, using retroillumination and the reflected-light of a wide slit beam at an angle of 45 degrees focused on the posterior capsule. PCO was subjectively graded on a scale from 1 to 10 and using POCOman. A multiple regression analysis was performed to evaluate factors that influence straylight after capsulotomy.
Straylight showed a good correlation with retroillumination and reflected-light PCO grading whereas VA only correlated with retroillumination. Both VA and straylight improved after capsulotomy. Straylight values presented a large variation after capsulotomy. Multiple regression analysis showed that increasing age and ocular axial length, hydrophobic acrylic IOLs, and small capsulotomies are factors that increased intraocular straylight.
Intraocular straylight is a useful tool in the assessment of PCO. It correlates well with PCO severity grading methods. When performing a posterior capsulotomy, factors such as age, IOL material, axial length, and capsulotomy size must be taken into consideration as they have an influence on intraocular straylight.
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