Monocular amblyopia and higher order aberrations

► Corneal and total HOA were compared between the fellow eyes of monocular amblyopes. ► Interocular differences in HOA vary with the type and magnitude of amblyopia. ► Interocular asymmetry in coma or trefoil may be caused by abnormal ocular development. This study compared the corneal and total higher order aberrations between the fellow eyes in monocular amblyopia. Nineteen amblyopic subjects (8 refractive and 11 strabismic) (mean age 30±11years) were recruited. A range of biometric and optical measurements were collected from the amblyopic and non-amblyopic eye including; axial length, corneal topography and total higher order aberrations. For a sub-group of eleven non-presbyopic subjects (6 refractive and 5 strabismic amblyopes, mean age 29±10years) total higher order aberrations were also measured during accommodation (2.5D stimuli). Amblyopic eyes were significantly shorter and more hyperopic compared to non-amblyopic eyes and the interocular difference in axial length correlated with both the magnitude of anisometropia and amblyopia (both p