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The art and science of pupil dilating devices

Poster Details

First Author: S.Bhattacharjee INDIA

Co Author(s):                  

Abstract Details


To analyze the artistic and scientific basis of existing devices for Pupil dilatation and to propose a balanced and practical model for such a device.


Nayan Eye Associates, Kolkata, India.


A list of existing pupil dilating devices was drawn up. The physics behind the forces required to dilate a Pupil was analyzed. Practical issues such as wound size, space for manipulation, stability during manipulation, preservation of cosmesis and function of pupil etc. were studied. Various theoretical designs were proposed and their merits and demerits were analyzed. Designs which would comply with the practical constraints were shortlisted. Further theoretical possibilities of materials, manufacturing techniques, surgical techniques etc. were explored.


A new open ring design was presently found to be the most effective balance between pupil dilatation, safety and ease of use.


Newer designs of devices keep evolving because on the ever increasing desire of the surgeon to raise the bar. This translates into tackling more challenging surgical situations with greater elegance and expertise. This is complemented by newer advances in operative visualization, surgical techniques, newer materials, better manufacturing processes etc. At the present time probably an open ring device appears to be a good choice but technological advances and the quest to constantly improve will soon bring about newer and more practical inventions.

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