8 cases of internal carotid artery insufficiency were studied to find out the various ophthalmic manifestations in such cases. 50% cases had ophthalmic signs and symptoms. These manifestations were amaurosis fugax, central retinal artery block, field defects, pupillary abnormalities and disc oedema. Ammaurosis fugax is a sign of impending carotid insufficiency and these cases must be investigated thoroughly.

Slit lamp ophthalmodynamometry was done by Dynoptor instrument in 6 cases of internal carotid artery, insufficiency, 18 cases of middle cerebral artery thrombosis and 20 control cases free from neurological disease. The average difference between the ophthalmic artery pressures of the two sides was 7.6% (diastolic) and 4.8% (systolic) in control cases. It was 6.6% (diastolic) and 4.6% (systolic) in cases of middle cerebral artery thrombosis. This difference was much higher in cases of ^-sub internal carotid artery insufficiency (41.3% 'diastolic and 25.4% in systolic); thus elucidating the role of ophthalmodynamometry as a non-invasive technique in diagnosis of these cases.

A quantitative estimation of the number of axons in the optic nerves of human foetuses ranging from approximately 8 to 26 weeks has been made. This study shows that from 8 weeks there is a steady increase in the number of axons with subsequent decrease by 26 weeks, during the period of lamination in the dorsal lateral geniculate nucleus (dLGN).

This is a study of 50 orbital CT Scans in emmetropic adults in 'the neuro ocular plane. A technique is involved to measure the axial length of the eye using CT Scan. It was also tried in 20 new born infants. The measurements are compared with other techniques of axial length measurement.

The most benign expression of the disease histiocytosis X is eosinophilic granuloma of bone. The most common presentation is a solitary granuloma as originally described by. Lichtenstein ^[1]. Multiple involvement and orbital involvement is extremely rare ^[2]. We present a case of diffuse eosinophilic granuloma of bone with orbital involvement but with no other significant visceral involvement.

A case of Graves' opthalmopathy treated with external radiotherapy has been reported. The role of radiation therapy in the management of this disease entity in context to the modern supervoltage era has ben discussed.

Eleven histologically proved cases of ocular malignant lymphoma diagnosed and managed during the year 1974-81 are reported. The follow-up period ranges from 2-7 years. The difficulties in diagnosis, treatment and prognosis are discussed.

A bilateral rare case of Marcus Gunn's phenomenon has been reported.

A case of bloody tears in a young hysterical female is described and rarity of the condition is stressed.

A rare case of neurofibroma of lacrimal gland showing malignant transformation in a male patient eye 31 years is reported. There was no evidence of recurrence 'on a follow up study.