Mechanical lagophthalmos, bilateral, upper and lower eyelids

This code describes the inability to fully close both the upper and lower eyelids on both eyes due to a mechanical obstruction or restriction. This mechanical interference prevents complete apposition of the eyelid margins, leading to exposure of the ocular surface.

Apply this code when documentation specifies bilateral mechanical lagophthalmos affecting both upper and lower eyelids. This is appropriate for conditions such as severe scarring, tumor growth, or post-surgical changes that physically impede eyelid closure.

• Ensure documentation clearly specifies "mechanical" lagophthalmos, as paralytic forms are coded differently.
• Verify laterality (bilateral) and involvement of both upper and lower eyelids are explicitly stated.
• Consider additional codes for the underlying cause of the mechanical obstruction (e.g., tumor, burn scar) if known and documented.