Iridocorneal Endothelial Syndrome Presenting With Large Diurnal Intraocular Pressure Fluctuation

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Abstract

Purpose of the Study:

The purpose of the study was to report a case of iridocorneal endothelial syndrome with an initial presentation of a large diurnal fluctuation of intraocular pressure (IOP) which peaked early in the morning.

Methods:

A 31-year-old white man had transient blurry vision oculus sinister (OS) upon awakening in the morning for the past 2 months. The blurry vision improved within 1 to 2 hours. Clinical examination, diurnal IOP measurements, and specular microscopy were performed to investigate the cause of his transient blurry vision.

Results:

At 6 AM, IOP OS was 38 mm Hg with corneal edema and visual acuity of 20/30. At 8 AM, IOP OS decreased to 25 mm Hg with clear cornea and visual acuity of 20/20. Diurnal IOP measurements revealed a large fluctuation OS (18 mm Hg). Specular microscopy revealed pleomorphism, polymegathism, light peripheral borders and light/dark reversal of the corneal endothelium OS. IOP oculus dexter remained within normal limits with clear cornea and stable visual acuity throughout the diurnal measurements.

Conclusions:

In patients with consistent daily episodes of transient blurry vision, clinicians should suspect a large diurnal IOP fluctuation with high peak IOP. If symptoms and signs are unilateral, iridocorneal endothelial syndrome should be included in the differential diagnosis and corneal specular microscopy should be obtained.

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