H35.52

Clinical Causes: Genetic mutations inherited from parents Autosomal dominant or recessive inheritance patterns X-linked inheritance in some cases Mutations affecting retinal pigment epithelium or photoreceptor cells

Key Symptoms: Night blindness (difficulty seeing in low light conditions) Gradual loss of peripheral (side) vision Decreased visual acuity over time Photophobia (sensitivity to light) Appearance of pigmented changes in the retina observed through eye examinations In some cases, color vision may be affected

Diagnosis Path: Diagnosis typically involves a comprehensive eye examination, including visual acuity tests, visual field assessments, and detailed retinal imaging such as fundus photography. Electroretinography (ERG) may be performed to evaluate retinal function, revealing diminished electrical responses that indicate photoreceptor degeneration. Genetic testing can help identify specific genetic mutations responsible for the dystrophy, aiding in diagnosis, prognosis, and family planning. Additionally, optical coherence tomography (OCT) imaging provides detailed cross-sectional images of the retina, assisting in assessing the extent of retinal layer degeneration.

Treatment Protocols: Currently, there is no cure for pigmentary retinal dystrophy. Management focuses on slowing disease progression and helping individuals adapt to vision changes. Strategies may include low vision aids and devices to enhance remaining vision, counseling, and regular monitoring by eye care professionals. Some emerging treatments, such as gene therapy and retinal implants, are under research and clinical trials, offering hope for future therapeutic options. Nutritional supplements like vitamin A have been explored, though their use should be guided by healthcare providers. Avoiding retinal toxins and protecting eyes from excessive light exposure may also be recommended to preserve retinal health.