Infantile esotropia: an inevitable legacy?

Area of Science:

• Ophthalmology
• Genetics
• Neuroscience

Background:

• Infantile esotropia is a common form of strabismus.
• Ciancia syndrome is a specific type of infantile esotropia.
• Understanding familial predispositions is crucial for strabismus research.

Purpose of the Study:

• To examine clinical signs and electrooculography (EOG) in relatives of infantile esotropia patients.
• To identify potential subclinical markers of infantile esotropia in unaffected family members.

Main Methods:

• Eight families with infantile esotropia were studied.
• Relatives underwent comprehensive eye exams and ocular motility testing.
• Electrooculography (EOG) recorded pursuit, optokinetic nystagmus (OKN), and saccadic eye movements.

Main Results:

• All families exhibited clinical and/or EOG anomalies in apparently normal relatives.
• Common clinical findings included reduced stereopsis.
• Frequent EOG abnormalities were observed, particularly in OKN tracings.

Conclusions:

• Infantile esotropia demonstrates familial inheritance patterns.
• Subclinical signs like abnormal OKN, impaired pursuit, reduced stereopsis, and nystagmus in abduction are common in relatives.
• Family history is vital for understanding the genetic transmission of infantile esotropia.