H44.4 - Hypotony of eye
H44.42 - Hypotony of eye due to ocular fistula
H44.421 - Hypotony of right eye due to ocular fistula
H44.422 - Hypotony of left eye due to ocular fistula
H44.423 - Hypotony of eye due to ocular fistula, bilateral
H44.429 - Hypotony of unspecified eye due to ocular fistula