In simple words: H02.0 describes a condition where the eyelid (entropion) and/or eyelashes (trichiasis) turn inwards, rubbing against the eye. This can be uncomfortable, causing irritation, a feeling of something in the eye, and watery eyes. If not treated, it could scratch the surface of your eye and affect your vision.

This code represents both entropion (the inward turning of the eyelid) and trichiasis (the inward turning of the eyelashes), where the eyelid and/or eyelashes rub against the surface of the eye (cornea and conjunctiva).This can cause irritation, foreign body sensation, excessive tearing, and potentially corneal damage.

Example 1: A 70-year-old patient presents with complaints of a gritty sensation, redness, and tearing in their right eye. Examination reveals the lower eyelid is turned inward, and the eyelashes are rubbing against the cornea. This is diagnosed as involutional entropion with trichiasis and coded as H02.0., Following a chemical burn to the face, a 35-year-old patient develops scarring of the lower eyelid, causing it to turn inward. This cicatricial entropion, along with the misdirected eyelashes (trichiasis), is coded as H02.0., A child born with an extra fold of skin on the eyelid causing the eyelashes to turn inward is diagnosed with congenital entropion and trichiasis, coded as H02.0.

Documentation should clearly specify the presence of both entropion and trichiasis, including the affected eye (right, left, or bilateral) and any associated symptoms or complications like corneal abrasions. The underlying cause, if known (e.g., involutional, cicatricial, congenital), should also be documented.