No abstract available.
Strabismus*

No abstract available.
Strabismus*

A study on 96 children with squint of which cross-eyed (74) treated in the institute of ophthalmology during 1993-1996 has shown that the merely exercise treatment recovered the biocular vision well for squint, for the latent squint at high grade, alternant squint at high grade, local accommodative cross eyed and concomitant squint at high grade, it should combine the exercise and balance surgical treatment.
Strabismus ; child

Plication of horizontal recti with many advantages in the treatment of strabismus has been applied by many authors in the world, but not yet in Vietnam. Objectives: to evaluate the results of this surgery that applied in Vietnamese. Methods: Prescriptive, longitudinal prospective study that had been done in Hanoi National Institute of Ophthalmology from 9/2003 to 9/2004. Results: In postoperative period, 83.3% of cases with exotropia and 89.6% of cases with esotropia are well corrected after 6 months, 100% of operated eyes are well healed with a smooth conjunctive scars and 52.62 % of operated patients have got a full binocular vision after 3 months following up. The rate of the eyes with suspected amblyopia is reduced from 18.8% to 9.8%, with moderate amblyopia is also reduced from 8.8% to 2.4% by 6 months postoperatively, but the rate of the eyes with severe amblyopia is not significantly changed after surgery. Conclusion: Plication of horizontal recti is a safe, effective method for correction of strabismus, especially when it is necessary to do surgery on many extra-ocular muscles in the same eye.
Strabismus ; Therapeutics

Numerous authors published tables showing the amount of strabismus surgery and the effectivity. Although Scobee and Knapp etc. stressed the difficulty of making an accurate prediction of strabismus surgery. the standardized formula of the surgical treatment of strabismus has long been the ambition of ophthalmologist. Author agreed with the opinion of Dyer who provided the ophthalmologist with excellent tables suggesting combinations of muscles and amount of surgery to correct various types of strabismus and so 132 cases of comitant horizontal strabismus treated surgically with Dyer method at Kong Eye Clinic from August 1975 to July 1976 were analyzed. With author's data. this paper present a mathematical formula to estimate the amount of strabismus surgery.
Muscles ; Strabismus*

Anterior transposition of inferior oblique muscle(ATIO) is known to an effective procedure for correcting marked overaction of inferior oblique muscle. However, depression in abduction and elevation deficiency in primary and abduction positions have occurred without adherence syndrome after this procedure. To avoid these complications, the author modiffied ATIO by transposing only the anterior portion of inferior oblique muscle at 2mm anterior to the temporal insertion site of inferior rectus, and placing the posterior portion of muscle just posterior to the insertion site of inferior rectus. Modified ATIO was performed in 4 cases of inferior oblique overaction(IOOA) with dissociated vertical deviation(DVD), 2 cases of unilateral IOOA withcontralateral superior oblique overaction(SOOA) and 5 cases of superior oblique palsy(SOP) Knapp class IV. They were observed for over 6 months (6~18 months). Three of 4 cases of IOOA with DVD were improved but adherence syndrome occurred in one case and depression in abduction occurred in another case. In 2 cases of unilateral IOOA with contralateral SOOA, hypertropia was decreased from 20delta and 2delta respectively, after the procedure. In 5 cases of SOP Knapp class IV, preoperative hypertropia was 20delta-40delta in primary position. After modified ATIO, hypertropia was 0delta-20delta . The correction effect was 12delta-35delta , with an average of 18.4delta in primary position. In 4 of 5 cases, hypertropia was corrected within 10delta in primary position. Modified ATIO is an effective procedure for unilateral IOOA with contralateral SOOA and SOP Knapp class IV as a single muscle surgery.
Depression ; Strabismus

PURPOSE: To evaluate the effect of amniotic membrane and additional use of 2% methylcellulose(Methocel(R)) in reducing the postoperative adhesions following strabismus surgery. METHODS: Twenty white rabbits (40 eyes) were divided into 4 groups: control group C (12 eyes), trial group A (12 eyes), trial group B (12 eyes), and normal group N (4 eyes). In group C, the superior rectus was detached and scleral scratching was done to provoke a fibrotic reaction, and then, the superior rectus was reattached to the original insertion site. In group A, the above procedure was done and in addition, the superior rectus was covered with two-folded amniotic membrane. In group B, the same procedure was done as in group A and in addition, Methocel(R) was coated between the muscle and adjacent tissues. Eight weeks later, we divided each group into two subgroups. In one group, we examined the degree of adhesion by the blunt dissection between the muscle and adjacent tissues, and in the other group, the histologic findings with a light microscope between the muscle and adjacent tissues. RESULTS: The adhesion degree on the blunt dissection and histologic examination was significantly reduced in groups A and B. But no statistically significant difference between groups A and B was shown in the postoperative adhesion. CONCLUSIONS: From these findings, it is expected that the use of amniotic membrane may reduce the postoperative adhesion after strabismus surgery and theadditional use of Methocel(R) may not be useful.
Amnion* ; Methylcellulose* ; Rabbits ; Strabismus*

Recently, the size of the globe has been considered to be an important factor in determining the amount of correction in strabismus surgery. We operated on 88 cases of basic exotropia after measuring the axial length using A-scan ultrasonography. The amount of correction was calculated from the axial length and angle of deviation in each case. At least 2 months postoperatively, 77 cases(87%) had less than 10 prism diopters eso or exodeviation. Favorable results can be expected by introducing the size of the globe in determining the amount of correction in strabismus surgery.
Exotropia* ; Strabismus ; Ultrasonography

Recently, the size of the globe has been considered to be an important factor in determining the amount of correction in strabismus surgery. We operated on 88 cases of basic exotropia after measuring the axial length using A-scan ultrasonography. The amount of correction was calculated from the axial length and angle of deviation in each case. At least 2 months postoperatively, 77 cases(87%) had less than 10 prism diopters eso or exodeviation. Favorable results can be expected by introducing the size of the globe in determining the amount of correction in strabismus surgery.
Exotropia* ; Strabismus ; Ultrasonography

PURPOSE: To investigate the effect of inferior oblique (IO) myectomy by analyzing the correlation of the amount of inferior oblique overaction (IOOA), hypertropia and excyclotorsion before, between, and after IO myectomy in patients with various degrees of IOOA. METHODS: A total of 86 eyes from 59 patients with IOOA who underwent IO myectomy were enrolled in the present study. The correlation analysis was performed for the amount of IOOA, hypertropia and excyclotorsion before and after surgery, according to the preoperative amount of IOOA, hypertropia, and excyclotorsion. RESULTS: The IOOA decreased from +2.5 +/- 0.6 before surgery to -0.01 +/- 0.25 (p < 0.05) after surgery. The vertical deviation was 5.7 +/- 6.3 prism diopter (PD) and 2.3 +/- 5.2 PD (p < 0.05) postoperatively. The amount of cyclodeviation was 15.3 +/- 7.6degrees before surgery and 6.6 +/- 5.7degrees (p < 0.05) after surgery. The amount of surgical correction for IOOA and the hypertropia was significantly correlated with preoperative deviation (p < 0.05, p < 0.05). The amount of excyclotorsion before and after surgery was also positively correlated but was not statistically significant (p = 0.05). CONCLUSIONS: IO myectomy can correct any degree of IOOA, hypertropia, and related excyclotorsion.
Eye ; Humans ; Strabismus