The renal-retinal connection - The eye in chronic kidney disease

Chronic kidney disease (CKD) is linked with several systemic complications, including ocular manifestations that can adversely affect quality of life. The prevalence and types of ocular changes in CKD patients, particularly their correlation with disease stages, are not well-documented. This study aims to evaluate the ocular manifestations in CKD and their association with different stages of the disease.A cross-sectional study on 70 CKD patients revealed a high prevalence of ocular abnormalities, including diabetic retinopathy, hypertensive retinopathy, and age-related macular degeneration. These conditions often worsened as CKD progressed, emphasizing the need for regular eye exams in CKD patients to prevent vision loss and address complications promptly. To investigate the prevalence and types of ocular manifestations in patients with chronic kidney disease (CKD) and to analyse their correlation with the stages of CKD. This cross-sectional, descriptive, non-interventional, hospital-based study was conducted over four months from May 2024 to August 2024 in the Department of Nephrology. Seventy patients with diagnosed CKD, aged 18 years and older, were included. Exclusion criteria were patients with reversible causes of renal failure, those who had undergone renal transplantation, and those who did not consent. A comprehensive ocular examination was performed on 140 eyes from the enrolled patients, assessing anterior and posterior segment findings, including visual acuity, eyelid conditions, conjunctival status, lens status, and fundus examination. The study included 38 males (54.3%) and 32 females (45.7%) with a mean age of 57 years. Hypertension and diabetes mellitus were the most common comorbidities, present in 71.4% and 64.3% of patients, respectively. Visual acuity deteriorated with advancing stages of CKD, with significant impairment and blindness observed predominantly in CKD stages 4 and 5. Anterior segment examination revealed that 62% of eyes had immature cataracts, and 38% were pseudophakic. Fundoscopic examination showed that 51.4% of patients had abnormal findings, including non-proliferative and proliferative diabetic retinopathy, hypertensive retinopathy, age-related macular degeneration, and glaucomatous disc changes. The severity of fundus abnormalities increased with the progression of CKD, highlighting a strong correlation between the degree of renal dysfunction and ocular health. Ocular manifestations are common in CKD patients and correlate with the severity of kidney disease. The prevalence of both anterior and posterior segment abnormalities underscores the need for regular ophthalmic evaluations in CKD patients to prevent vision loss and manage ocular complications early.