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Biomedical subjects

L E Weene

Publications and source records attributed to L E Weene.

12 recordsLinked to original sources
PubMed1993

Flexible open-loop anterior chamber intraocular lens implants.

PURPOSE: To determine the efficacy of flexible open-loop anterior chamber intraocular lens (AC IOL) implants in cataract surgery complicated by vitreous loss and in secondary implantation. METHOD: Results were reviewed in 18 eyes in the former group and in 43 eyes in the latter group that were operated on by the author over an 8-year period. RESULTS: Of 18 eyes in the former group, 13 (72%) had a final visual acuity of 20/40 or better. Cystoid macular edema was the most common cause of the decrease in visual acuity. Of 43 eyes in the latter group, 37 (86%) had a final vision equal to the best-corrected preoperative vision. A retinal complication developed in 6 of 18 eyes that received a primary AC IOL with vitreous loss, whereas no retinal complications developed in any of the 14 eyes that received a secondary AC IOL with vitreous loss (P = 0.021). For secondary AC IOL implantation, eyes with vitreous loss treated by Weck-cel sponge vitrectomy had the same visual results as eyes without vitreous loss. CONCLUSION: Flexible open-loop AC IOLs are safe and effective for primary implantation after vitreous loss and for secondary implantation.

Aged↗
PubMed1985

Recurrent corneal erosion after trauma: a statistical study.

Office records of 377 consecutive traumatic corneal abrasions were examined. Twenty-nine cases experienced at least one episode of recurrent corneal erosion (7.69%). There were no recurrences in patients under 20 years of age (P less than .01). The size of the original abrasion could not be correlated with recurrence rate. Injuries with paper, fingernails, or bushes and branches were 4.9 times more likely to recur than injuries from all other materials (P less than .001).

Adolescent↗
PubMed1984

Delayed onset of aphakic cystoid macula edema.

Cystoid macula edema occurred in both eyes of two patients three years after routine intracapsular cataract extraction. Vitreous adhesion to the cataract wound was noted in all four eyes within eight weeks of surgery. The relatively young age and good health of both patients may explain why their perifoveal capillaries remained competent so long after surgery.

Aphakia, Postcataract↗
PubMed1983

Bursting point of sutured limbal incisions.

The bursting point of standard limbal cataract incisions closed with five or 11 sutures was measured in postmortem eyes with an air gauge and bulb. Bursting point was a minimum of 90 mm Hg when five sutures of either 7-0 polyglactin 910 or 10-0 nylon closed the incision. Eleven sutures increased the average bursting point 55% for nylon and 87% for polyglactin 910. Bursting point was higher for flat than watch-glass-beveled incisions. Wound leak always occurred at pressures well below the bursting point.

Aged↗
PubMed1981

The Verhoeff capsule forceps: clinical and experimental results.

Lenses were pulled from rabbit and human eyes with a Verhoeff forceps suspended from a pulley. One human lens capsule ruptured with 10 gm and one with 14 gm. Eight human lenses were pulled out intact with 10 to 18 gm. One rabbit lens capsule ruptured with 18 gm and one with 20 gm. Eight rabbit lenses were pulled out intact with 12 to 24 gm. The cryoprobe on the pulley did not rupture any lenses. Thirty grams of counter pressure reduced the pull required to extract rabbit lenses by 50%. Weights were added to a Verhoeff forceps suspended from a rabbit lens supported by a lens loop. One lens was ruptured at 17 gm, and nine lenses were pulled through the loop with 17 to 27 gm. Capsule rupture occurred in 2.4% of 500 consecutive senile immature cataract extractions done with the Verhoeff forceps and counter pressure. Counter pressure did not disturb the vitreous body.

Aged↗
PubMed1978

Cataract extraction without a conjunctival flap.

Wound healing in 350 cases of senile cataract extraction done with a corneal incision without a conjunctival flap and closed with 3 deep 6-0 chromic gut sutures is examined. There were no cases of epithelial downgrowth and a low incidence of conjunctival blebs. There was one case of endothalmitis and 4 of iris prolapse. Sutures fell out between the 9th and 16th days and the large knots did not cause excessive irritation while in place. There was an 18% incidence of wound leak manifested by shallow or flat anterior chamber. All of these anterior chambers reformed spontaneously soon after the sutures fell out, indicating the wound leak was probably along the sutures tract. One patient with wound leak developed mild glaucoma postoperatively. Wound healing after cataract surgery is discussed. Epithelial downgrowth and conjunctival blebs are related more to tight silk sutures than absence of conjunctival flap. The early loss of the gut sutures does not decrease wound strength since the sutures have already lost their tensile strength. The epithelium which grows into the cataract wound postoperatively when a flap is not used activates stromal fibrocytes and covers any delayed iris prolapse.

Cataract Extraction↗
PubMed1978

Self-sealing incision for peripheral iridectomy.

A peripheral iridectomy was done in 42 cases using an incision perpendicular to the cornea at the anterior edge of the conjunctival epithelium. No conjunctivalflap or sutures were used. No attempt was made to reform the anterior chamber by irrigation of fluid through the incision. The results were satisfactory.

Glaucoma↗