H18.71

Clinical Causes: Previous corneal refractive surgery, especially LASIK or keratoplasty Progressive degenerative diseases of the cornea Genetic predisposition to corneal thinning disorders Injury or trauma to the eye causing weakening of the corneal tissue Rare cases of spontaneous corneal thinning without identifiable cause

Key Symptoms: Blurred or distorted vision Increased sensitivity to light Halos or glare around lights, especially at night Frequent changes in prescription vision correction needs Slight eye discomfort or irritation in some cases Visible bulging or thinning of the cornea in advanced stages

Diagnosis Path: Diagnosing corneal ectasia involves a comprehensive eye examination, including detailed corneal imaging techniques such as corneal topography and tomography. These tools help measure the shape, thickness, and curvature of the cornea, allowing eye care professionals to detect abnormal thinning and protrusion characteristic of ectasia. Additional tests may include slit-lamp examination and measurement of intraocular pressure to evaluate overall eye health.

Treatment Protocols: Management strategies for corneal ectasia aim to stabilize the cornea and improve visual acuity. Treatment options include: - **Prosthetic Contact Lenses:** Specialized lenses like scleral lenses or rigid gas-permeable contacts can help correct vision distortion. - **Corneal Cross-Linking:** A minimally invasive procedure that strengthens corneal tissue by applying riboflavin (vitamin B2) and UV light, which can halt or slow disease progression. - **Intracorneal Implants:** Devices like intracorneal ring segments can reshape the cornea to improve vision. - **Corneal Transplantation:** In severe cases where other treatments are ineffective, a full-thickness or partial-thickness corneal transplant may be considered. Regular follow-up with an ophthalmologist is crucial for managing this condition and monitoring any progression or response to treatment.