Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0086543 (cataract)
 29,165 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

After a single oral dose of 25 mg/kg tranexamic acid in 37 patients with cataract as the sole eye disease, the concentration of the drug was measured in both the serum and the aqueous at various intervals following intake. The serum concentration was highest after three h (average 15.44 mg/l), but a trace of tranexamic acid (0.7 mg/l) could still be found after 19 h. In the aqueous, the concentration was likewise highest after three h (average 1.62 mg/l), but, following this, the fall in tranexamic acid concentration was very gradual and after 19 h was found to be 1.3 mg/l. In two patients who had received 25 mg/kg three times daily for three days, an aqueous concentration of 2.3 mg/l was found eight h after the final intake.
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PMID:Serum and aqueous humour concentration of tranexamic acid after peroral administration. 47 89

This is a survey of the causes of blindness recorded by three students of The City University during a six-week stay at NOOR Eye Institute in Kabul, Afghanistan. The nature of the sample used makes it unsuitable for direct comparison with surveys from other countries. Nevertheless, broad conclusions can be drawn. Severe eye disease is a considerable problem in Afghanistan, in common with other developing countries. The survey included all new patients seen in the outpatient clinic, blind to the extent of being unable to count fingers at more than three metres, in one eye or both. The sample of patients was examined by an ophthalmologist working with our team. A diagnosis was made and various social and demographic questions were asked with the help of an interpreter. In all, 473 patients were examined and included in our survey sample, a very high proportion of the new patients attending the clinic (40.46 per cent). The main causes of blindness were found to be cataract (31.12 per cent), corneal scarring (19.8 per cent), chorioretinal degenerations (6.79 per cent), glaucoma (6.65 per cent) and aphakia (5.52 per cent). Of the major causes of blindness, about forty per cent of the cases were considered remediable, and about thirty per cent could have been prevented. An outstanding difference between the causes of blindness in developed nations and those seen in Afghanistan was the amount of blindness caused by infection, especially in the younger age groups (up to 30 years). Cataract is a major cause of blindness in the older age groups of both societies. People suffering from ocular disease in Afghanistan wait until their sight is badly impaired or lost completely before seeking treatment. This results from a lack of knowledge of what could be done to conserve sight, the irreversible nature of many eye diseases, the distances involved in travelling to the clinic, and even a lack of knowledge of its existence.
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PMID:Some causes of blindness seen at Noor Eye Institute, Afghanistan. 54 66

To minimize the risk of visual loss in diabetic patients, recognition of early signs of oculopathy is essential. Diabetes-associated third-nerve palsy is manifested by unilateral ptosis and exotropia. Symptoms of closed-angle glaucoma are intense pain, halos around lights, and blurred vision. Open-angle glaucoma does not necessarily produce symptoms and is treated medically. A gradual decrease in visual acuity, sometimes associated with photophobia and difficulty in night driving, and monocular diplopia, are manifestations of cataract. The patient with "background" retinopathy usually complains of blurred or distorted central vision. Once the macula is involved, vision progressively decreases. Although the relationship of metabolic control to retinopathy has not been settled, evidence indicates that good medical control of the disease may delay onset of vascular complications.
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PMID:Four common ocular complications of diabetes--and how to treat them. 71 Aug 91

The art and science of intraocular lens implantation surgery is expanding. Highly successful results with elderly uncomplicated cataract patients have led to cautious implantation surgery in patients with co-existing eye disease. The results of implantation surgery achieved in sixteen patients with combined corneal disease and cataract formation are analyzed. In twelve patients penetrating keratoplasy was performed prior to cataract removal and implantation surgery, performed simultaneous with or in combination with secondary implantation in previously aphakic eyes. Vitrectomy was avoided in all primary lens insertion procedures but was necessary in two secondary implantations without ontoward effect. In this entire group of twelve patients all grafts have remained clear, there was minimal tissue reaction and visual return was excellent. In those with pre-existing corneal disease not requiring keratoplasty including one instance of Fuch's Corneal Dystrophy, there was no change in corneal status as a result of implantation surgery.
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PMID:Keratoplasty and intraocular lenses. 77 12

Corticosteroid therapy is of great value in many types of eye disease. The indications are briefly discussed, together with the choice of agent and mode of administration. The dangers of steroids are now widely recognized, and the complications are discussed, particularly cataract and glaucoma. Reference is also made to optic neuritis and thyroid ophthalmopathy, where the role of steroids is uncertain. Particular stress is laid on the need to keep steroid dosage as low as possible, so as to avoid systemic side effects. There are unfortunately many situations where treatment of doubtful efficacy has produced severe side effects. Despite the overall benefit of steroids in ophthalmology, there is a pressing need to find alternative treatment for a variety of blinding disorders.
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PMID:Steroids and the eye--indications and complications. 79 55

Prevention of blindness is the most important aim of ophthalmology. Prevention of blindness is related to many factors. It is related to many factors, such as science and technology, economy and social behavior. There are worldwide activities by WHO, NGOs and other functions to promote the prevention of blindness in the world. More than 90% of blind population lives in developing world. Cataract is the top causes of blindness which is curable. Onchocerciasis is an endemic disease in west Africa and central America. Onchocerca Control Project (OCP) was formed in 1974 under WHO for the control of oncocerciasis by the funds of developed countries. The control of vector (simulium) as well as new drug are giving the the project the prospect of success in eradicating the disease, thus preventing the blindness by diseases. The situation on blindness by trachoma, childhood blindness, glaucoma, diabetes will be discussed. The progress of molecular genetics of eye disease may open the gate for prevention of blindness by these disease in future.
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PMID:The prevention of blindness--past, present and future. 128 79

Prevention of blindness is the most important aim of ophthalmology. Prevention of blindness is related to many factors. It is related to many factors, such as science and technology, economy and social behavior. There are worldwide activities by WHO, NGOs and other functions to promote the prevention of blindness in the world. More than 90% of blind population lives in developing world. Cataract is the top causes of blindness which is curable. Onchocerciasis is an endemic disease in west Africa and central America. Onchocerca Control Project (OCP) was formed in 1974 under WHO for the control of onchocerciasis by the funds of developed countries. The control of vector (simulium) as well as new drug are giving the the project the prospect of success in eradicating the disease, thus preventing the blindness by diseases. The situation on blindness by trachoma, childhood blindness, glaucoma, diabetes will be discussed. The progress of molecular genetics of eye disease may open the gate for prevention of blindness by these disease in future.
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PMID:[The prevention of blindness--past, present and future]. 129 98

Cataract is a slowly developing eye disease, the prevalence of which rises with age. Although patients often adapt to the diminished visual acuity accompanying the development of cataracts, their functional health may be impaired by poor vision. An index for visual functioning was derived from the literature. As older people often have additional chronic diseases, vision, visual functioning index and chronic co-morbidity were measured. Functional health was measured with different validated instruments. Eighty cataract patients participated in this study and were visited at home. Results showed statistically significant correlations between vision and co-morbidity on the one hand and visual functioning and functional health on the other. As in most participants vision was only slightly impaired, these results might even be more pronounced in patients with mature cataract. We conclude that indications for cataract surgery might not only be derived from visual acuity, but also from visual functioning and functional health.
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PMID:Cataract, functioning and co-morbidity: a cross-sectional study in family practice. 145 82

Using non-invasive anterior chamber fluorophotometry, we performed a double-blind, randomized clinical trial on the effects of dexamethasone 0.1% and prednisolone acetate 1.0% eye drops on the blood-aqueous barrier after phacoemulsification and posterior chamber lens implantation. Twenty patients received one of the preparations topically to the surgically treated eye 5 times daily for a period of 5 days, beginning the day after surgery. Patients chosen for the study had no history of eye disease other than senile cataract nor of systemic diseases influencing the eyes. No other steroids or non-steroidal anti-inflammatory drugs were given before or during the investigation. The fluorometric data measured 5 days after surgery show a lower mean concentration of fluorescein in the dexamethasone alcohol 0.1% treated group compared with the prednisolone acetate 1.0% treated group. The difference is statistically not significant. The clinical assessment of postoperative ocular inflammation did correlate with the fluorophotometric measurements. The results of the study indicate that although dexamethasone is the more potent anti-inflammatory agent, with a better binding affinity to glucocorticoid receptors, we are--with the number of cases measured--unable to demonstrate any difference in the efficacy in protecting the blood-aqueous barrier after cataract extraction and posterior chamber lens implantation to prednisolone acetate.
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PMID:Effect of dexamethasone 0.1% and prednisolone acetate 1.0% eye drops on the blood-aqueous barrier after cataract surgery: a controlled randomized fluorophotometric study. 152 12

The validity of reported ocular disease was investigated in a population-based epidemiologic study of persons aged 43-86 years residing in Beaver Dam, Wisconsin. In a telephone survey conducted from September 1987 through May 1988, histories of cataract and age-related macular degeneration were obtained from the subject for 2,155 cases and from a surrogate for 1,433 cases. Within 2 years, these persons underwent a complete ocular examination. At that time, an "in-person" self-reported history of eye disease was obtained and disease presence was determined based on ocular photographs. The reporting methods, telephone versus in-person and surrogate versus subject, were compared and the validity of each assessed. Reporting methods were in agreement in better than 90% of all cases. Reporting of cataract showed a sensitivity of 20.4 for surrogate by telephone, 30.2 for self-report by telephone, and 37.8 for self-report at the examination. Sensitivity of reported age-related macular degeneration was poorer, with the highest rate of 17.9 for the "in-person" self-report. Specificity was better than 90.0 for all reporting methods for both cataract and age-related macular degeneration. These data suggest that estimates of prevalence of ocular disease should not be based solely on reported histories, and that clinical determinations are necessary.
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PMID:The validity of self-reported and surrogate-reported cataract and age-related macular degeneration in the Beaver Dam Eye Study. 177 18


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