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Year : 1974  |  Volume : 22  |  Issue : 1  |  Page : 40-41

Artificial tear tank attached to ordinary spectacles

St. John's Medical College, Bangalore, India

Correspondence Address:
S G Ram Narayan Rao
St. John's Medical College, Bangalore
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Source of Support: None, Conflict of Interest: None

PMID: 4448536

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How to cite this article:
Ram Narayan Rao S G. Artificial tear tank attached to ordinary spectacles. Indian J Ophthalmol 1974;22:40-1

How to cite this URL:
Ram Narayan Rao S G. Artificial tear tank attached to ordinary spectacles. Indian J Ophthalmol [serial online] 1974 [cited 2021 Jun 16];22:40-1. Available from: https://www.ijo.in/text.asp?1974/22/1/40/31379

A number of cases of advanced xerophthal­mia following trachoma were seen by me before going to England. While in England 1 devised an artificial tear tank with these cases in mind. I have tried it on one patient only with success on both eyes. The patient was a woman aged 34 years from Kerala. She had Ayurvedic treatment in her village for seven years for trachoma resulting in grade IV trachoma with severe scarring of conjunc­tiva leading to xerophthalmia, keratitis and corneal opacities [Figure - 1],[Figure - 2]. After giving her a course of systemic sulphonamide and local ointment of oxytetracycline hydrochlo­ride, a slant incision through thickness of the left lower lid at the level of the lower fornix near lateral canthus was made big enough to admit a medium size Bowman's lacrimal probe. A rubber tube was then stitched through the wound and kept in place for a week to establish a permanent passage. After removing the rubber tube the fine poly­thene tube attached to the tear tank was passed through the newly established passage. After 6 weeks a similar operation was per­formed on the other side.

The artificial tear tank is a reversible tank that can be used on either side. It is a rectangular plastic container 3 cm. long, 1½ cm. in breadth and 1½, cm. in height [Figure - 3],[Figure - 4]. It has screw stoppers above and below made water tight by rubber washers. There are 4 hooks, 2 above and 2 below, which hold the tank to the side of the spectacle frame. There are two stainless nuts, one on top and another on the bottom which are identical. These nuts are embedded in the roof and floor of the tank. The nuts contain screw holes and into these are screwed a holder for syringe on one side and a metal tap on the other side. The holder for syringe is needed to attach a syringe and push out any airblock that might develop. The metal tap adjusts the rate of flow. Into the metal tap a fine polythene tube is fitted. The other end of the polythene tube is passed through the passage made through the lower lid at the level of the lower fornix whenever the tear tank is worn.

The patient although uneducated has been able to manage the wearing of tear tank very well. She wears it all through the day. She has to fill it 3 to 4 times a day. This has made her eyes comfortable, greatly reduced the photophobia and increased her vision from counting fingers at 2 feet to counting fingers at 2 meters. She is happy and grateful for this treatment. Low visual acuity is due to corneal opacities in both eyes. Fluid used in the tank is simple 2/3rd strength normal saline. Eyes are kept clean with instillation of sulphacetamide drops.

I am thankful to Mr. W. S. Deaville of Hanwell Optical Company Ltd., Letchworth, Herts, England for making the artificial tear tank according to my design.


  [Figure - 1], [Figure - 2], [Figure - 3], [Figure - 4]


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