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Results for “refractive error”

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At least 523 records · Page 29Linked to original sources
PubMed1997

Capsular management and refractive error in pediatric intraocular lenses.

BACKGROUND: Guidelines for intraocular lens (IOL) implantation in children regarding patient selection, age limitations, operative techniques, including management of the posterior capsule, and refractive goals are not universally agreed on. METHODS: The authors placed posterior chamber IOLs in the capsular bag of 79 eyes in 57 children. Patient age ranged from 10 months to 17 years. Follow-up averaged 2 years. Patients were selected on the basis of age, cataract morphology, laterality, and lack of potential complicating factors. In general, postoperative refractions were intended to be mildly hyperopic with the magnitude dependent on patient age. RESULTS: Seventy-nine percent of patients able to report a postoperative visual acuity showed 20/40 or better visual acuity. Vision was limited by amblyopia in the remaining patients. There were no significant complications. The posterior capsule opacified on average 2 years after surgery regardless of patient age. CONCLUSIONS: Implantation of posterior chamber IOLs in carefully selected children appears to be effective and safe. Consideration should be given to primary posterior capsulectomy-anterior vitrectomy at the time of lens implant in children who are not expected to be candidates for yttrium aluminum garnet (YAG) capsulotomy within 18 months of surgery.

Adolescent↗
PubMed1991

[Incidence of refraction errors in Polish physicians].

An extensive inquiry sheet comprising between others questions on refraction had been sent by post to doctors chosen by chance. The incidence of myopia in the general population was estimated on 23.1-27.7 p.c. in men and 26.0-34.4 p.c. in women. The incidence of hyperopia--distinctly dependent on the age of the addressee--was 1/3 smaller; astigmatism showed to be the least frequent. No essential connection between the kind of error and the anthropometric characteristics, morbidity and the type of personality was found.

Adult↗
PubMed1977

Effect of visual environment on refractive error of cats.

33 eyes of 18 cats raised in cages or in small rooms under conditions of near vision were compared with 22 eyes of 11 street cats. Refraction of the caged cats showed that three quarters of them were myopic (average:-0.8 D) while 87.5 percent of the street cats were hypermetropic (average: +1.4 D). The antero-posterior diameter was practically equal in both groups (20.4 mm) and in both myopic and hypermetropic eyes. The site of the permanent refractive changes is suggested to be the lens.

Animals↗