Telecanthus is aEUR'
Increase in intercanthal distance with normal interpupillary distance Telecanthus is the congenital condition in which there is increased distance b/w the medial canthi or angles of the eyelids. The interpupillary distance (IPD) remains normal. (If a veical line is drawn through lacrimal punctum it will cut cornea as shown in fugure.) The normal distance b/w the medial canthi (the intercanthal distance) is equal to the length of each palpebral fissure mm) Hypeelorism - Occular or orbital hypeelorism is a condition of widely separated eyeballs with increased inter pupillary distance & broad nasal bridge. This condition is often associated with cleidocranial or craniofacial dysostosis & sometimes with mental deficiency. Normal interocular distance D. lacrimal True ocular punctum lar hypeelorism cuts cornea. with secondary telecanthus - veical line through & IPD is increased Primary telecanthus - inner canthi are far apa, although the outer canthi are normally spaced (interpupillary distance is normal). Note veical line through lacrimal punctum cuts cornea. True ocular hypeelorism - Both inner & outer canthi are abnormally far apa Conditions/syndromes associated with telecanthus Prader - Willi syndrome Pena - Shokeir syndrome BBB syndrome Dystopia cantharum Hypeelorism with esophageal abnormality and hypospadias. Opitz syndrome Epicanthus - It is a semilunar fold of skin which covers the medial canthus. It is the most common congenital anomaly of the lids & is a normal facial feature in the Mongolian race.
Narrow medial epicanthus
Widely separated medial orbital wall
Lateral epicanthal fold thickened
Increase in intercanthal distance with normal interpupillary distance