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Combination Four-Dot Light
NOTES, CASES, INSTRUMENTS COMBINATION FOUR-DOT LIGHT W. S. MUENZLER,
M.D.
Oklahoma City, Oklahoma Recently, I described a miniature four-dot flashlight1 and indicated its advantages over the ordinary Worth four-dot flashlight. With the latter, one tests peripheral fusion. Be cause of the small size of the miniature light and consequent smaller retinal image, one tests central fusion. It is the purpose of this report to describe a four-dot flashlight which incorporates both the conventional size lights with the miniature one.* INSTRUMENT
The ordinary four-dot flashlight is modi fied so that miniature dots are placed in the center of the light (Fig. 1). The 1 mm dots are separated by 8 mm and, when held 33 cm from the patient, form a retinal image which falls on the rod-free area of the fovea. A lever on the light allows the miniature fourdot test to be shifted to the ordinary size dot. From The Department of Ophthalmology, The University of Oklahoma Medical Center, Oklahoma City, Oklahoma. Reprint requests to W. S. Muenzler, M.D., 430 Northwest 12th Street, Oklahoma City, Oklahoma 73103. * Available from Parsons Optical Laboratories, 530 Powell Street, San Francisco 2, California.
SUMMARY
An ordinary four-dot flashlight has been modified so that miniature dots are placed in the center of the light and the usual size dots are placed in the periphery. This permits measurement of both peripheral and central fusion with the same instrument. REFERENCE
1. Muenzler, W. S. : Miniature Four-Dot Test. Am. J. Ophth. 65:928,1968.
LOCALIZED XANTHOMATOSIS O F ORBIT HARI MOHAN, F.R.C.S., D H A N K. SEN, M.S.,
AND P. K. CHATTERJEE,
M.D.
New Delhi, India Localized xanthomatosis in the orbit, a term used by Duke-Elder,1 is extremely rare. Only a few cases are recorded.1·2 The lesion, characterized by the presence of foam cells, is thought by many to represent a disorder of fat metabolism or storage. However, the present consensus of opinion is that this fat acquisition is secondary in nature. The un derlying cause of the lesion is unknown, but thought by some to be an unknown infec tious agent.3 Because of the rarity of such lesions in the orbit, the following case is recorded. CASE REPORT
A 25-year-old man presented himself with the complaint of gradual, painless protrusion of the right globe of about six months' duration. Visual acuity in the right eye was undisturbed, and the left eye was normal in all respects. He could not recall trauma to the right orbital region. The globe was moderately proptosed and displaced downwards. Ocular movements were restricted on looking up. From the Department of Ophthalmology and Pa thology, Irwin Hospital and Maulana Azad Medical College, New Delhi, India. Reprint requests to Dr. Hari Mohan, 11/B, Fig. 1 (Muenzler). Drawing of lens of four-dot Ganga Ram Hospital Marg, New Delhi 5, India. flashlight, showing positioning of dots. 1080
M.D.
Oklahoma City, Oklahoma Recently, I described a miniature four-dot flashlight1 and indicated its advantages over the ordinary Worth four-dot flashlight. With the latter, one tests peripheral fusion. Be cause of the small size of the miniature light and consequent smaller retinal image, one tests central fusion. It is the purpose of this report to describe a four-dot flashlight which incorporates both the conventional size lights with the miniature one.* INSTRUMENT
The ordinary four-dot flashlight is modi fied so that miniature dots are placed in the center of the light (Fig. 1). The 1 mm dots are separated by 8 mm and, when held 33 cm from the patient, form a retinal image which falls on the rod-free area of the fovea. A lever on the light allows the miniature fourdot test to be shifted to the ordinary size dot. From The Department of Ophthalmology, The University of Oklahoma Medical Center, Oklahoma City, Oklahoma. Reprint requests to W. S. Muenzler, M.D., 430 Northwest 12th Street, Oklahoma City, Oklahoma 73103. * Available from Parsons Optical Laboratories, 530 Powell Street, San Francisco 2, California.
SUMMARY
An ordinary four-dot flashlight has been modified so that miniature dots are placed in the center of the light and the usual size dots are placed in the periphery. This permits measurement of both peripheral and central fusion with the same instrument. REFERENCE
1. Muenzler, W. S. : Miniature Four-Dot Test. Am. J. Ophth. 65:928,1968.
LOCALIZED XANTHOMATOSIS O F ORBIT HARI MOHAN, F.R.C.S., D H A N K. SEN, M.S.,
AND P. K. CHATTERJEE,
M.D.
New Delhi, India Localized xanthomatosis in the orbit, a term used by Duke-Elder,1 is extremely rare. Only a few cases are recorded.1·2 The lesion, characterized by the presence of foam cells, is thought by many to represent a disorder of fat metabolism or storage. However, the present consensus of opinion is that this fat acquisition is secondary in nature. The un derlying cause of the lesion is unknown, but thought by some to be an unknown infec tious agent.3 Because of the rarity of such lesions in the orbit, the following case is recorded. CASE REPORT
A 25-year-old man presented himself with the complaint of gradual, painless protrusion of the right globe of about six months' duration. Visual acuity in the right eye was undisturbed, and the left eye was normal in all respects. He could not recall trauma to the right orbital region. The globe was moderately proptosed and displaced downwards. Ocular movements were restricted on looking up. From the Department of Ophthalmology and Pa thology, Irwin Hospital and Maulana Azad Medical College, New Delhi, India. Reprint requests to Dr. Hari Mohan, 11/B, Fig. 1 (Muenzler). Drawing of lens of four-dot Ganga Ram Hospital Marg, New Delhi 5, India. flashlight, showing positioning of dots. 1080