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Retinal nerve fiber layer thickness in human strabismic amblyopia
T P Colen1, J T de Faber, H G Lemij
1The Rotterdam Eye Hospital, Rotterdam, The Netherlands. colen@oogziekenhuis.nl
Binocular Vision & Strabismus Quarterly
|July 14, 2000
Summary
Strabismic amblyopia did not show statistically significant differences in nerve fiber layer thickness compared to sound eyes. Nerve Fiber Analyzer measurements from amblyopic eyes can be compared to normative databases.
Area of Science:
- Ophthalmology
- Neuroscience
Background:
- Amblyopia involves visual cortex and lateral geniculate nucleus changes.
- Retinal abnormalities in amblyopia have not been previously reported.
Purpose of the Study:
- Compare nerve fiber layer (NFL) thickness in amblyopic vs. sound eyes in strabismic amblyopia.
- Evaluate the validity of using Nerve Fiber Analyzer (NFA) normative databases for amblyopic eyes.
Main Methods:
- Utilized a third-generation NFA (GDx scanning laser polarimeter) to measure NFL thickness.
- Compared various NFL thickness parameters between amblyopic and sound eyes in 20 patients.
- Excluded patients with nystagmus, neurological disease, or glaucoma.
Main Results:
- Sound eyes generally showed slightly higher NFL thickness measurements than amblyopic eyes.
- The average difference in NFL thickness was 1.5%, which was not statistically significant (p = 0.6).
Conclusions:
- The small, non-significant differences suggest NFL thickness is largely preserved in strabismic amblyopia.
- The NFA's built-in normative database is suitable for reference data when measuring amblyopic eyes.