The Effect of SLT Laser Application on Iris to Treat Sectorial Heterochromia: A Promising Technique

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Abstract

The purpose of this study is to report a new and promising method for changing iris color in a sectorial heterochromia iridis patient. A 22-year-old man with a complaint of innate color disparity between his eyes presented to our clinic to seek medical advice. He underwent a comprehensive ophthalmic examination, including visual acuity, biomicroscopy, fundoscopy, intraocular pressure measurements, endothelial cell count, and evaluation of iridocorneal angle. The causes of acquired heterochromia were excluded. After a detailed explanation of the procedure and probable side effects, the patient underwent an application with a laser device that produces a frequency-doubled 532 nm wavelength Nd:YAG laser beam with a spot size of 400 μm (selective laser trabeculoplasty laser device). The heterochromic areas (brown) were divided into zones and a gradual treatment pattern was performed to avoid inflammation and flare. The patient showed no side effects such as increased intraocular pressure, pain, corneal edema, hypopyon formation, decrease in visual acuity, synechia, or iris defect. After two complete sessions, the color difference disappeared and a solid eye color was achieved.

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