Causes of Dissociation of Ocular Motility (of)

1. DEVELOPMENTAL

• Failure of orientation fixn (anomalies in central vision, fov nervous system, occlusion, v blurred image, strabismus) - CONGENITAL NYSTAGMUS innate attempts to fixate
• Failure of conjgate fixn - COMITANT STRAB
• Failure of disjuntive reflex - ANOM OF CONVERGENCE/NEAR STRAB
• Stress of corrective fusion reflex - HETEROPHORIA
• Failure of conj. eye movements - CONGEN/INFANTILE INCOMITANT STRAB

2. ACQUIRED

• Pathological accident in neuro-muscular mechanism - NON COMITANT STRAB
• Path. accident in central mechanism - CONJUGATE DEVIATION (eg gaze palsy)
• Disruption of fixn/a postural mechanism - ACQUIRED NYSTAGMUS