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Mathematical cataracts: time to tame the beast?

Poster Details

First Author: S.Nanaiah INDIA

Co Author(s):    S. Das   M. Kurian   M. Paryani   K. Shetty   R. Shetty  

Abstract Details


To study the internal aberrations in a patient complaining of poor image quality until development of clinically significant cataract.


Tertiary eye hospital in Bangalore, India


Internal aberrations of a patient who presented with ghosting and poor visual quality without clinically significant cataract were studied using ray tracing aberrometry. The patient was followed up until clinical signs of cataract developed a year later. Internal aberrations were studied again and cataract surgery with implantation of toric intraocular lens was performed.


High internal aberrations were noted on presentation (trefoil: 0.179microm; Spherical aberration: 0.208microm) which increased as clinically significant cataract developed (trefoil: 0.279 microm; coma: 0.356 microm; spherical aberration: 0.246 microm). After cataract surgery, patientÂ’s quality of vision improved symptomatically with reduction in internal aberrations (trefoil: 0.012microm; coma: 0.025 microm; spherical aberration: 0.020 microm).


Increase in internal aberrations may be an indicator of impending development of cataract and this without clinical signs may be described as a mathematical cataract. Cataract surgery at this stage may be warranted if the patient is symptomatic. Studying the changes in values of internal aberrations may in the future change the outlook of operable cataracts where numbers may help the surgeon do the math.

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