With the support of the World Vision, in June 2004, the district Chi Linh Health Centre (Hai Duong province) co-operated with Institute of Ophthalmology to survey on blindness and some eye diseases in 3,370 people. Objectives: identify the situation of blindness and some eye diseases in Chi Linh in the year 2004; identify the trachoma prevalence after 4 years implementing the project of trachoma control in Chi Linh. Methods: cross sectional study; Target population: all people. Results of survey has shown the prevalences of blindness and some eye diseases are so high compared with the figures of country survey, the leading causes of blindness are cataract, glaucoma, corneal opacity and pterigium. Conclusion: Thank to project of trachoma control supported by WV conducted in Chi Linh from 1999, the prevalence of active trachoma now has dropped to level under the criteria of WHO on active trachoma elimination. However, the rate of trichiasis is very far from criteria of WHO. Results of survey has shown also the serious situation of blindness. That is the big challenge for health workers and ophthalmologists in Hai Duong province and Chi Linh district in order to reduce the blindness prevalence in the next years.
Eye Diseases, Blindness, Epidemiology

Overaction of the inferior oblique muscles is the most common clinical form of the motility disturbance of oblique muscles which has been rarely studied in Vietnam. 150 patients aged of 4years old and older suffered from strabismus with disturbance of the oblique muscles (78.6% of them had overaction of the inferior obliquemuscle) were studied in National Institute of Ophthalmology. Objectives: to identify the clinical forms and characteristics, to evaluate the results of operation. Method: This study was designed belongs to prospective clinical trial in hospital. The operated patients were observed and evaluated during 2 years after surgery divided into three terms (short term, medium and long term). The results of surgery was optimistic. Conclusion: overaction of the inferior oblique is a clinical form of motility disturbance of the oblique muscles having the best surgical results.
Muscles, Therapeutics, Surgery