Clinical aspect of the eye
A lateral section at the optic chiasm will lead to an ipsilateral nasal hemianopsia. A section posterior to the optic chiasm at the optic tract causes a left sided homonymous hemianopsia if the section is on the right side.
A section across the optic chiasm in the sagittal plane leads to bitemporal heteronymous hemianopsia. This usually occurs in pituitary tumor because of the close relationship between the hypophysis cerebri and the optic chiasm.
Clinical Examination of II
Complete lesion of the oculomotor cause the following features
Dilatation of pupil
Loss of the following reflexes due to paralysis of constrictor pupillae
Divergent squint. This is caused by the perpetual action of the
Clinical Examination of III
Diplopia (double vision) occurs when the patient attempts to looks downwards and laterally with damage to trochlear nerve.
Clinical Examination of IV
Damage to the abducent nerve is common in fractures of base of skull. It causes convergent squint and diplopia.
Clinical Examination of VI
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Creator: Oluwole Ogunranti