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Biomedical subjects

F C Lawrence

Publications and source records attributed to F C Lawrence.

9 recordsLinked to original sources
PubMed2001

Macular hole after laser in situ keratomileusis and photorefractive keratectomy.

PURPOSE: To describe three myopic patients who developed unilateral macular hole after undergoing bilateral laser in situ keratomileusis or photorefractive keratectomy. METHODS: Case reports. RESULTS: Three eyes of three myopic patients developed a macular hole in one eye after bilateral laser in situ keratomileusis or photorefractive keratectomy. The macular hole formed between 4 to 7 weeks after laser in situ keratomileusis in case 1 (a 48-year-old woman), and within 2 months after laser in situ keratomileusis in case 2 (a 36-year-old woman). In case 3 (a 45-year-old man), the macular hole was found 9 months after photorefractive keratectomy. A vitrectomy closed the macular hole of case 1 with final best-corrected visual acuity of 20/25 and case 2 with 20/30, whereas case 3 declined further surgery. CONCLUSION: A macular hole may develop in myopic eyes after laser in situ keratomileusis or photorefractive keratectomy. Vitreoretinal interface changes may play a role.

Adult↗
PubMed1994

"Lens lasso" repositioning of dislocated posterior chamber intraocular lenses.

BACKGROUND: Dislocation of posterior chamber intraocular lenses poses unique surgical problems for the vitreous surgeon. Although many methods have been devised to correct this problem, none are easily accomplished. A new technique that simplifies this task is described. METHODS: Six patients with complete posteriorly dislocated posterior chamber intraocular lenses underwent this procedure. Five lenses had prolene haptics and one was all polymethylmethacrylate. All except one traumatic case were spontaneous dislocations. A 9-0 prolene suture was transocularly placed through opposite sides of the ciliary sulcus; slip knots were tied on the internal ends and these knots then used to "lasso" the intraocular lens haptics. This achieved, the lens was easily pulled back up into the ciliary sulcus. RESULTS: All patients tolerated the procedure well without any complications. Lens centering was excellent and the externalized sutures showed no erosion through the conjunctiva. Visual acuity was 20/40 or better in all but the one patient with traumatic dislocation, who had a final visual acuity of 20/100. Average length of follow-up period was 17 months. CONCLUSIONS: This surgical technique offers distinct advantages to the surgeon by eliminating cumbersome manipulation of the dislocated intraocular lens, more accuracy in lens replacement, and secure suture attachment to the lens haptics.

Cataract Extraction↗
PubMed1989

Children's television viewing with family members.

The amount of time children view television with other family members was examined. The sample of 151 children was 6 through 17 yr. of age. Data were gathered by personal interviews conducted in the home. Analysis showed that children spent 75 min. per day (65% of their viewing time) watching television with family members, most often a sibling. When children did watch television with a parent, the parent was most likely the father. Rarely did the entire family view together.

Adolescent↗
PubMed1986

Adolescents' time spent viewing television.

This study examined the amount of time adolescents spend viewing television. Findings indicated that adolescents viewed television 147 minutes per day, or an average of 17 1/4 hours per week. Employment of mother significantly affected the time adolescents spend viewing television. Sex of adolescent, age of father, mother, and adolescent, education of father and mother, income of family, and day of week were not significant factors. Adolescents watched television with another family member 65% of the total viewing time, but were unlikely to engage in other activities at the same time.

Adolescent↗
PubMed1985

A new upper blepharoplasty clamp.

New right and left blepharoplasty clamps have been devised which conform to the three-dimensional curves of the adult upper eyelids. These are suggested for use in older patients who require excision of a large amount of skin and are an adjunct in upper blepharoplasty. We have used the new clamps successfully in 20 upper blepharoplasties. The clamps provide for a rapid, bloodless removal of large amounts of skin.

Equipment Design↗