Regular astigmatism, left eye

This code signifies a refractive error in the left eye where the cornea or lens has an irregular curvature, causing light to focus unevenly on the retina. This results in blurred or distorted vision at all distances, specifically affecting the left eye.

Assign this code when documentation explicitly states regular astigmatism affecting the left eye. This diagnosis is typically made during a comprehensive ophthalmological examination, often supported by retinoscopy or autorefraction findings.

• Ensure laterality is accurately documented; this code is specific to the left eye.
• Distinguish between regular and irregular astigmatism; this code is for regular astigmatism only.
• Do not use this code if the astigmatism is congenital (Q13.1) or irregular (H52.23-).