Clinical profile and etiological spectrum of patients presenting with corneal hydrops over a 12-year period.

Purpose: To describe the demographics, clinical characteristics, and management of corneal hydrops in patients presenting to a multi-tier ophthalmology hospital network in India.

Design: Cross-sectional hospital-based study.

Methods: Of the total of 3,140,941 new patients presenting between October 2010 and March 2022, patients with a clinical diagnosis of corneal hydrops in at least one eye were included in the study. All the data was collected using an electronic medical record system.

Results: 1291 eyes of 1110 patients were diagnosed with corneal hydrops and included in the study and 961 patients (83.69%) had a unilateral affliction. Corneal hydrops was noted to be significantly more common in males (62.43%) and adults (62.7%). The most common age group at presentation was during the second decade of life with 472 (42.52%) patients. They were more commonly from the higher socio-economic status (77.3%) and from the urban geography (44.23%). In the 1291 eyes, 567 (43.92%) eyes had a visual impairment of blindness (> 20/400-20/1200) followed by moderate visual impairment (> 20/70-20/200) in 166 (12.86%) eyes. Overall, the most common etiology was keratoconus in 1,082 (83.81%) eyes followed by primary congenital glaucoma (PCG) in 91 (7.05%) eyes. Surgical intervention to hasten the recovery of hydrops was performed in 7.82% of eyes with ectasia and as a definite management in 7.05% eyes with PCG. Visual rehabilitation was with contact lenses in 29.1% eyes and keratoplasty in 13.94% eyes.

Conclusion: Corneal hydrops is predominantly unilateral and is more common in males. Keratoconus was the commonest etiological condition; however, the risk of hydrops was highest in keratoglobus, followed by PMD. Most affected age was the second decade of life and visual impairment was severe in majority (60%). A surgical intervention was performed in a third of the cases.