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Keratomalacia on a 'Healthy Diet'

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Keratomalacia on a 'Healthy Diet' Br J Ophthalmol: first published as 10.1136/bjo.70.5.357 on 1 May 1986. Downloaded from British Journal of Ophthalmology, 1986, 70, 357-360 Keratomalacia on a 'healthy diet' JANE OLVER From the Ophthalmic Department University Hospital of Wales, Cardiff SUMMARY The case is described of a 39-year-old man with previously undiagnosed chronic schizophrenia and with bilateral keratomalacia secondary to his bizarre diet. He presented with a perforation of the right cornea which required an emergency penetrating keratoplasty. The difficulties of clinical management of a patient with an overt psychosis and the use of serum retinol levels to monitor treatment are described. Causes of vitamin A deficiency seen in Great Britain are discussed. Vitamin A deficiency is common throughout the and deterioration of visual acuity. He denied any world in general but is rarely seen in the United problems with night vision but admitted that for four Kingdom. It is closely associated with protein energy months he had become a recluse, staying in his room malnutrition,' and it arises when the diet contains with the lights off and finding his way around by practically no whole milk or butter and very limited touch. During the five days prior to presentation he amounts of fresh vegetables or fruit, therefore lack- described two episodes of profuse watering from the ing both retinol and carotenes. The disease is almost right eye. unknown in Europe today, but an outbreak in His general appearance was unkempt and emaci- Denmark during the first world war is instructive.23 It ated and he appeared severely malnourished. His http://bjo.bmj.com/ occurred despite the fact that Denmark had very visual acuity was reduced in each eye to counting large dairy herds, so that ample supplies of Vitamin fingers. Examination was hampered by his excited A should have been available. However, because and uncooperative state as well as his severe photo- most of the butter was exported to Germany, the phobia and discomfort. He refused to be examined poor could obtain only separated milk and lived on a at the slit-lamp. His lids were erythematous and diet of oatmeal gruel and barley broth. Some 700 oedematous, with a marked purulent discharge. His children were affected of which 400 had keratoma- conjunctivae were chemosed and severely injected, on September 30, 2021 by guest. Protected copyright. lacia. In 1918 a weekly ration of butter was issued and with dry keratinised epithelium typical of xerophthal- the disease disappeared. mia. The corneae were of ground glass appearance. A case of bilateral keratomalacia and endophthal- The right cornea had a superior marginal perforation mitis with a right perforated cornea is described. The with an iris prolapse, a flat anterior chamber, and a patient was a previously undiagnosed chronic schizo- hypopyon. The left cornea had a similarly placed phrenic. He had been observing a strict vegan diet for desmetocoele, containing sloughed material, a seven years, resulting in severe nutritional deficien- formed anterior chamber, and a hypopyon. There cies (a vegan is an extreme vegetarian, who consumes was a second smaller ulcer near the centre of the left no animal food or dairy products whatever). cornea. The above findings precluded a clear fundal view. Case report General examination revealed widespread skin lesions which were pigmented and keratinised, with History and examination. This 39-year-old Caucasian follicular plugging. male was admitted as an emergency with a marginal His mental state was assessed by the psychiatrists, perforation of the right cornea. He had been who confirmed a diagnosis of chronic schizophrenia, "worried' about his eyes for the previous five days, with 'knight's move' thought disorder and autoch- complaining of photophobia, watering, discharge, thonous delusions. Correspondence toJane Olver, FRCS, Moorfields Eye Hospital, City Further inquiry revealed that he had eaten a Road, London EC1V 2PD. strange diet. He believed that poisons entered the 357 Br J Ophthalmol: first published as 10.1136/bjo.70.5.357 on 1 May 1986. Downloaded from 358 Jane Olver R EYE L EYE Fig. 1 Above: Preoperative appearance ofcorneae showing position ofrightperforation and left desmetocoele and ulcer. Below: Postoperative appearance of corneae showingposition ofright penetrating keratoplasty and confirmingfindings in the left eye. R L body in our food and that a 'good' diet was essential orally, 500 mg of each four times a day, and intensive to maintaining good health. He had therefore topical antibiotics, gentamicin and chloramphenicol become a vegetarian in the 1960s and in 1977 had eye drops hourly initially, with atropine cycloplegia. become a strict vegan. In addition to excluding all He required three subconjunctival injections of animal and dairy produce he had completely avoided methicillin and gentamicin on three consecutive even vegetables and fruit for seven years. His diet postoperative days. Four days after operation topical consisted of partially cooked brown rice, pulses, and steroids were introduced for uveitis and vitritis. He sprouting alfafa, all very low in vitamin A and remained on systemic antibiotics for three weeks, carotenoids. He believed that this was a well and topical treatment was gradually reduced over balanced diet and included all essential nutrients. On eight weeks. admission he weighed 55 kg, and after two months' A regimen of vitamin A replacement therapy was http://bjo.bmj.com/ inpatient stay on a high protein, high calorie diet he started, and the serum levels monitored at intervals weighed 75-5 kg. (Table 2, Fig. 2). After much persuasion he agreed to Immediate management. Examination under take a high protein, high calorie vegan diet with anaesthetic confirmed our earlier findings. We additional multivitamins. carried out an emergency right upper segment Progress. The patient's eyes rapidly improved on penetrating keratoplasty. The edges of the ulcer vitamin A replacement therapy. The corneal haze around the area of perforation were very friable and cleared over two weeks. Five months after presenta- on September 30, 2021 by guest. Protected copyright. had to be excised to allow secure suturing of fresh donor material to make good the defect (Fig. 1). Table 1 Biochemical investigations on admission Investigations. Culture of conjunctival swabs from each eye grew Haemophilus influenzae and com- Serum level Normal range mensals. Serum retinol, 13-carotenoid, retinal binding Retinol 0-56 tM 2-13-4.64 LM protein, and prealbumin were extremely low. There Carotene 0-20 tLM 0-64-64 FM was evidence of generalised malnourishment with a Retinol binding protein 16 mg/l 36-84 mg/I very low vitamin D and fasting triglyceride and Pre-albumin 70 mg/l 269-405 mg/l Vitamin D 0-3 ng/l 8-50 ng/l cholesterol levels. Vitamin B12, vitamin C, zinc, and (25-hydroxycholecalciferol) copper were all at the lower limit of normal (Table 1). Vitamin B12 170ng/I 120-600ng/I Other workers have suggested that electroretino- Folate 7-4 yg/l 1-66-0 Fg/I gram (ERG) and dark adaptation tests are useful in Zinc 9-8 tLmolll 8-17 tmol/I Copper 12-5 utmol/l 13-27 nmolAI monitoring this condition (see Discussion), but Magnesium 0-83 mmol/l 0-7-1-2 mmol/I unfortunately our patient would not co-operate with Total protein 52 g/l 60-80 g/I any of these investigations. Nor would he allow us to Albumin 34 g/I 34-45 g/I photograph him. Calcium 2-13 mmol/l 226-2-0 mmol/I Treatment. the Fasting triglyceride 0-3 mmol/l 0-8-2-0 mmoIli Postoperatively endophthalmitis Fastingcholesterol 1-2 mmol/l 2 5-8 8 mmol/l was treated with systemic ampicillin and flucloxacillin Br J Ophthalmol: first published as 10.1136/bjo.70.5.357 on 1 May 1986. Downloaded from Keratomalacia on a 'healthy diet' 359 Table 2 Serum levels ofretinol in response to vitamin A Discussion therapy Vitamin A deficiency4 can cause nyctalopia, xeroph- Retinol levels, pmol/I thalmia, and keratomalacia. Night blindness was Normal range 2-13-4-64 recognised in ancient Egyptian and Chinese writings On admission 0-56 in 1500 BC and was treated with liver, which is rich in 1 week 1-3 vitamin A. It was also well known to the Greek and 2 weeks 2-3 Roman 5 weeks 2-6 physicians. 12 weeks 1-6 Keratomalacia is recorded in children in the indus- after admission and start oftreatment trial slums of nineteenth century Europe. By the early twentieth century it was rare, occurring only in isolated outbreaks such as the one in Denmark tion his visual acuity had improved to R 6/18, L 6/12. during the first world war. His eyes were white and uninflamed, with an opaque Today vitamin A deficiency, xerophthalmia, and but avascular right superior corneal graft, a similarly keratomalacia are rare in Western developed placed left corneal scar, and a small scar close to the countries, but in many parts of the world kerato- left visual axis. He refuses to wear glasses to correct malacia is a major cause of blindness in children, the right astigmatism (induced by the graft), though particularly in Asia, certain parts of West Africa, the correction improves the visual acuity to 6/9. Fundus Middle East, Brazil, and Haiti. In these countries it is examination is almost impossible, as he develops closely associated with protein malnutrition. A low intense blepharospasm on attempted ophthalmo- dietary intake, compounded by hypoproteinaemia, scopy. results in a low level of retinol binding protein required to transport retinol in the plasma, while chronic intestinal infections and diarrhoea impair absorption of vitamin A and carotenoids. 0% . ._ Severe protein malnutrition is rare in the Western .% co co developed countries.
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