EyeWiki:Featured article/March 15, 2021

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Featured Article for March 14, 2021

Pupil Expansion Devices and Mechanical Stretching of the Pupil

Maximal preoperative pharmacological dilation of the pupil should be achieved in such cases of poorly dilating or non-dilating pupils. Ophthalmic viscosurgical devices (OVDs) must be used in the anterior chamber to dilate the pupil to the maximum and to maintain the anterior chamber. Care should be taken to avoid overfilling the anterior chamber which may push iris backward and may cause difficulty in fixing the pupil expansion devices. Also, some OVD causing a mild separation of the pupil and the anterior capsule of the lens helps in the proper engagement of the expansion device.

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