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Pinhole pupilliplasty (PPP) for higher order aberrations: assessment of visual quality and depth-of-focus

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First Author: P.Narang INDIA

Co Author(s):    A. Agarwal   J. Holladay                 

Abstract Details

Purpose:

To evaluate visual quality and depth-of-focus under photopic and mesopic light condition of subjects treated with pinhole pupilloplasty (PPP) for corneal higher order aberrations (HOAs).

Setting:

Dr. Agarwal’s Eye hospital, Chennai, India.

Methods:

PPP was performed with single-pass-four-throw procedure in 14 eyes of 14 patients. Post PPP, patients were analyzed with Clinical-Trial-Suite machine that offers standardized method of recording visual quality. The luminance of 85 cd/m2 and 3 cd/m2 were set for photopic and mesopic lighting condition and Uncorrected and best-corrected visual acuity (UCVA; BCVA) were recorded for distance (4 m), intermediate (66 cm) and near vision (44 cm). Low contrast acuity (LCA) at 10 % and mesopic contrast sensitivity function (CSF) with Glare ON and OFF at 4 spatial frequencies of 1.5, 3, 6 and 12 cycles/degree and defocus curve were assessed.

Results:

Under photopic and mesopic conditions, significant difference was observed postoperatively in UCVA and BCVA for distance, intermediate and near. The defocus curve demonstrated extended depth-of-focus that ranged from +1.5 D to -2.5 D and LCA at 10 % demonstrated significant improvement for all cases. For mesopic CSF, significant improvement was noted at spatial frequencies of 3 and 6 cycles/degree with glare ON; with glare OFF improvement was seen at spatial frequency of 1.5, 3 and 6 cycles/degree whereas no difference was noted at 12 cycles/degree.

Conclusions:

Early results demonstrate that PPP provides improved visual quality and extended depth-of-focus and can be a useful option in cases with HOAs.

Financial Disclosure:

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