Official ESCRS | European Society of Cataract & Refractive Surgeons


Objective/ocular scatter index: a study of its utility in lens surgery

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Session Details

Session Title: Cataract Surgery Equipment

Session Date/Time: Monday 16/09/2019 | 08:30-10:30

Paper Time: 10:12

Venue: Free Paper Forum: Podium 3

First Author: : H.Rashed EGYPT

Co Author(s): :    T. Eliwa   T. Abdel Raziq   A. El Massry                       

Abstract Details


To define the added benefit of measuring light scatter in the decision making process in phacoemulsification and refractive lens exchange (RLE) surgeries.


Ain Shams University, University of Alexandria, Watany Eye Hospital, Roaya vision center - Egypt


The charts of 120 patients(aged ≥40) who had phacoemulsification either for cataract or as RLE were reviewed and divided into 5 groups: Group N comprised cases of nuclear cataract, group P of posterior subcapsular cataract, group C of cortical cataract. For patient who had RLE, Group M had patients with high myopia and group H with hyperopia presenting for RLE. Postoperatively the groups according the IOL implanted were monofocal (IQ, Alcon, USA), toric (EnvistaToric, B&L, USA), and trifocal (PhysIOL, Belgium). The objective/ocular scatter index (OSI) measured by the HD Analyzer (Visiometrics, Terrassa, Spain) preoperatively and at 3 months postoperatively.


9.952375(±3.896235654) in group P. In group M the mean OSI was 3.287(±0.3199) and that of group H was 1.038833333 (±0.355103015). Postoperatively eyes in the monofocal group had a mean OSI of 1.489269231(±0.775420018), those in the toric had 2.102333333(±0.279775505), and those in the trifocal had 2.319666667(±0.311039119). The mean OSI improvement in all cataract groups (mean gain of 4.088137019), and was not significantly changed in RLE who had monofocal IOL implanted (mean loss of 0.450435897), and amounted to a loss of 1.280833334 when a trifocal IOL was implanted.


The utility of the OSI in lens surgery is beneficial in both preoperative and postoperative assessments. It can help surgeons reach better levels of finesse and manage patient expectations.

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