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Biomedical subjects

L Schwab

Publications and source records attributed to L Schwab.

At least 19 recordsLinked to original sources
PubMed1995

The epidemiology of trachoma in rural Kenya. Variation in prevalence with lifestyle and environment. Study Survey Group.

PURPOSE: Ocular examination surveys were carried out in Kenya by the International Eye Foundation as a component of the Kenya Rural Blindness Prevention Project to determine the national prevalence of blindness and ocular morbidity and major causes. A goal of the surveys was to determine the overall geographic distribution and severity of trachoma throughout Kenya. METHODS: Using a random cluster household sampling technique, 13,803 people of all ages and of diverse cultural and ethnic backgrounds were identified in eight regions of Kenya. A detailed examination for active and inactive trachoma was carried out on each person surveyed as part of the general ocular examination. RESULTS: The prevalence rate of visual loss (< 20/60) due to trachoma in the better eye was 7.2/1000. Active trachoma was present in 19% of all persons examined, and 50% of all those with trachoma were found to have moderate to severe inflammation. Prevalence varied according to survey region from less than 1% in four regions where agriculture is the economic base, to 57% and 63% in two arid pastoral regions. Trachoma prevalence varied from 28% in children younger than 3 years of age to 11% in persons older than 60 years of age. Potentially blinding eyelid deformities secondary to chronic trachoma occurred in 5.0% of the rural population, and 1.2% of the rural population displayed associated corneal scarring. Lid scarring, corneal scarring, and lid deformities were greater in prevalence among females of all age groups when compared with males. CONCLUSIONS: Trachoma prevalence in Kenya varies widely from region to region. High prevalence is associated with high climatic aridity, and lower prevalence is associated with areas of greater rainfall, sustainable agriculture, and a higher general standard of living. Within high-risk regions, there are wide variations in age-specific prevalence and severity of the disease. Potentially blinding sequelae of trachoma are more prevalent in females than in males.

Adolescent↗
PubMed1994

Eye care delivery in developing nations: paradigms, paradoxes, and progress.

Only 5% of the world's population is found in the United States, yet we as a nation consume 40% of the world's resources. In stark contrast, two thirds of the world's population live in developing countries where 90% of all blindness occurs and where even the most basic resources for eye care delivery are scarce or absent. Using U.S. criteria defining blindness (less than 20/200 [6/60]), the World Health Organization estimated in 1984 that 42-52 million people were blind from all causes, an increase of more than 10% since 1978. High population growth rates in most developing countries coupled with the failure of governments to develop health services commensurate with needs are responsible for this trend. On economic grounds alone, the U.S. eye care delivery paradigm cannot be broadly replicated in the developing world. Instead, cost-effective creative strategies, many already in place, such as mass surgery camps in Asia and delivery of eye care by non-ophthalmologists in Africa, can be expanded and streamlined. The upgrading of sight restoration and preservation care depends upon mobilization of political will within the international health community; governments must prioritize eye care as a public health problem; health planners must mobilize financial resources and work closely with technical assistance organizations, and ministries of health must cease to emulate expensive high-technology eye care models.

Africa↗
PubMed1994

With an eye to good practice: traditional healers in rural communities.

In Africa, certain traditional treatments for eye diseases can produce ocular damage and visual loss. However, many practices do not cause harm, and some may be beneficial. Traditional healers are often valuable resource persons, helping to provide an understanding of cultural beliefs and practices relating to eye disease, and delivering eye care at community level. These matters are discussed below with special reference to conditions in Zimbabwe.

Eye Diseases↗
PubMed1994

Hepatocellular carcinoma metastatic to the orbit in an African patient.

Primary hepatocellular carcinoma rarely metastasizes to the orbit. We report a 19-year-old black man from Zimbabwe who had hepatomegaly and an orbital mass. An orbital biopsy suggested a diagnosis of hepatocellular carcinoma. Immunohistochemical stains supported the diagnosis. To our knowledge, this is only the second reported case of hepatocellular carcinoma metastasizing to the orbit and the first such reported case from Africa.

Adult↗
PubMed1993

Blindness in Africa: Zimbabwe schools for the blind survey.

An ophthalmic assessment survey of 430 students in Zimbabwe's two schools for the blind was conducted in 1988. Bilateral corneal opacity was found to be responsible for 75% of all blindness among institutionalised blind students. Thirteen per cent of the study patients could gain improved vision through either ocular surgical intervention or spectacle correction. Findings in this survey are similar to those from other schools for the blind elsewhere in Africa.

Adolescent↗
PubMed1990

Blindness and eye disease in Kenya: ocular status survey results from the Kenya Rural Blindness Prevention Project.

A series of eight regional eye surveys were conducted in Kenya as part of the Kenya Rural Blindness Prevention Project. Each survey consisted of clinical examinations of about 1800 individuals selected by a random cluster sampling technique in geographically distinct and culturally homogeneous rural areas; 13,803 examinations were completed in all. Together these surveys provide the basis for national estimates of the prevalence and aetiology of visual loss and ocular pathology. The results showed that 0.7% of rural Kenyans are blind in the better eye by WHO standards, and another 2.5% suffer significant visual impairment. Rates of visual loss tend to increase five-fold in each 20-year age cohort. Females have higher prevalence of visual loss than males over age 20, and certain geographical areas have markedly higher rates. The commonest cause of both blindness and visual impairment is cataract, accounting for 38% of all visual loss. Trachoma (a localised problem), glaucoma, macular degeneration, and severe refractive errors follow cataract as leading causes of blindness in the better eye. Trauma, corneal scars of various causes, phthisis, and staphyloma are important causes of monocular blindness. Nutritional eye disease does not appear to be a problem of any magnitude in rural Kenya.

Adolescent↗