Tensile Strength of Musculoscleral Insertion after Superior Rectus Recession on Rabbit

PURPOSE: The author performed this experimental study to investigate the changes in the tensile strength of a new insertion following a superior rectus recession in a rabbit's eye. METHODS: Conventional superior rectus muscle recession procedures with the hang-back suture technique were performed on New Zealand white rabbits (body weight 2~3kg), after which the disinsertional force was measured using a digital tension gauge on the 3rd, 5th, and 7th days, and then weekly for up to 8 weeks postoperatively. RESULTS: The postoperative disinsertional forces were as follows: 38.25 +/- 2.75, 165 +/- 31.27, and 167.25 +/- 26.99 g at the 3rd , 5th and 7th days, and 211.00 +/- 25.66, 222.75 +/- 26.66, 255.25 +/- 24.51, 271.50 +/- 38.25, 429.50 +/- 21.14 g at the 2nd, 3rd, 4th, 6th and 8th weeks respectively. The disinsertional forces linearly increased with the postoperative time period and there was a strong correlation with correlation coefficient being 0.903. CONCLUSIONS: We concluded that musculoscleral adhesion with hang-back suture maintained enough strength in early postoperative time period.

Clinical Experiences on Patients with Canalicular Laceration

We reviewed retrospectively 51 cases of patients with canalicular laceration from March 1994 to April 1999 about the patient characteristics, associated ocular injuries and other clinical informations through medical records. The injuries were most commonly occurred between the age of 20 to 39(27cases, 52.9%). The most common cause of injury was due to violence by kick or fist blow(26 cases, 51%), and accidental injuries by sharp-pointed objects in all cases under the age of 10(5 cases, 9.8%). Most cases have occurred to the lower eyelid(41, 80.4%), 6 cases(11.8%)to upper lid, and 4 cases(7, 8%)to both upper and lower lids. The right side was involved in 34 patient(66.7%), whereas the left side was involved in 17 patients(33.3%). While reviewing the used materials in canalicular repair, canaliculoplasty was not performed in 11 patients(21.6%)due to various reasons, Mini-Monoka was used in 34 patients(66.7%)and bicanalicular stent in 7 patients(13.7%). The increased incidence of epiphora was noted in those cases with notrepaired canalicular laceration, early protrusion of stent, and incomplete anatomical repair of lid margin and medial canthal angle due to extensive injury.

A Case of Type 2 Waardenburg Syndrome with Open angle Glaucoma

Waardenburg syndrome is a very rare auditory-pigment syndrome with autosomal dominant inheritance. In his first report in 1951, Waardenburg characterized this syndrome as dystopia canthorum, a high broad nasal bridge, synophrys[confluent eyebrows], heterochromia iridid, a white forelock or early graying, and sensory neural deafness. We observed a case of Type 2 Waardenburg syndrome with openangle glaucoma and, therefore report with literature review.