No abstract available.
Humans ; Ocular Motility Disorders*

To investigate whether the slanted medial rectus recession can correct excess esotropia at near without overcorrection at distance and reduce the distance-near deviation difference, we examined 11 convergence excess esotropia patients who had deviation at near exceeding distance esotropia by 15PD or more, and underwent this operation. They composed of 7 partially accommodative esotropia with high AC/A ratio and 4 nonaccommdodative convergence excess esotropia. The surgical procedure consisted of bilateral, symmetrical slanted recession of the medial rectus muscle. The amount of recession of the upper and lower margins were calculated so as to correct the esotropia with correction at distance, and near respectively. The preoperative mean near and distance deviation were 33.8PD and 15PD, and each decreased to 9.2PD and 4.3PD postoperatively. The preoperative mean distance-near deviation difference were 18.8PD, and decreased to 5.4PD postoperatively. The 3 patients decreased over 10PD in the distancenear deviation difference. In conclusion, the surgical procedure, as bilateral slanted medial rectus recession, can correct excess esotropia at near without overcorrection at distance and reduce the distance-near deviation difference. Therefore, the bilateral slanted medial rectus recession may be used as the method of surgical treatment in convergence excess esotropia.
Esotropia* ; Humans ; Ocular Motility Disorders*

No abstract available.
Ocular Motility Disorders* ; Tuberculosis, Meningeal*

PURPOSE: To evaluate the effects of converted intermittent exotropia type with part-time occlusion therapy on final postoperative outcomes. METHODS: The present study included 140 consecutive intermittent exotropia patients. On the patient's first visit, the type of intermittent exotropia was determined according to the deviation angle. After preoperative part-time occlusion therapy, the type of intermittent exotropia was reevaluated. The surgical success rates of each group was compared retrospectively according to the converted type. RESULTS: At the first visit, the basic type was the most prevalent (n = 112), followed by convergence insufficiency type (n = 18) and pseudo-divergence excess type (n = 10). Mean deviation angle on the first visit was 25.42 +/- 6.05 PD at distance and 26.19 +/- 8.20 PD at near. There were significant changes in near deviation angle after part-time occlusion in patients with the basic and convergence insufficiency types (p = 0.045, 0.03, respectively). Twenty-seven patients who had converted from basic type to pseudo-divergence excess type and from convergence insufficiency type to basic type showed better surgical success rate (89%) than other patients (69%) (p = 0.033). CONCLUSIONS: Part-time occlusion therapy converts the type of intermittent exotropia by reducing near deviation angle and is related to a better surgical success rate.
Exotropia ; Humans ; Ocular Motility Disorders ; Retrospective Studies

No abstract available.
Craniocerebral Trauma* ; Head* ; Ocular Motility Disorders*

This study is concerned with human vertical saccadic systam to various visual stimulus. A system is described fer the recording and analysis of corrective movements and the angular velocities asscciated with 10 degrees and 20degrees vertical saccades. Recordings wsre made with photoelectric IR reflection method and the saccades were induced by a target system which operates on non-predictable manner. Statistical results for average peak veIomnes of right eye are given for a group of 4 normal subjects and compared with horizontal saccades. Most of corrective movements were categorized to saccadic and glissadic and magnitude of corrective errors were within 1 degree and 2 degrees and showed 20% production rate. The peak velccity statistics showed as 280 and 440 deg/s associated with 10 degrees and 20 degrees vertical movement and downward values were slightly faster than upward movements. Our results were compared with horizontal saccades and discussed the possibility of research and clinical tool that could be used on a large number and variety of patients.
Eye Movements* ; Humans ; Ocular Motility Disorders* ; Saccades

The authors report jerky seesaw nystagmus, extorsional downbeating in the right eye and intorsional upbeating in the left eye, in a patient with right internuclear ophthalmoplegia (INO). This pattern of nystagmus may occur by disrupting pathways from contralateral posterior and anterior semicircular canals by a lesion in the medial longitudinal fasciculus. Depending on damage to the pathways from contralateral vertical canals, various patterns of dissociated torsional-vertical nystagmus may accompany INO.
Humans ; Ocular Motility Disorders* ; Semicircular Canals

Internuclear ophthalmoplegia(INO)is a horiwntal ocular motor disturbance caused by a lesion of the medial longitudinal fasciculus. We have experienced a case of bilateral internuclear ophthalmoplegia associated with exotropia, which revealed the symptom of bilateral impairment of adduction and dissociated nystagmus of the abducting eye on horizontal gaze in either direction. No bilateral internuclear ophthalmoplegia caused by trauma has yet been reported in this country. Here we report the case of the trauma-related medial longitudinal fasciculus lesion and its pathophysiology along with a literatural review.
Exotropia ; Nystagmus, Pathologic ; Ocular Motility Disorders*

No abstract available.
Infarction ; Mesencephalon ; Ocular Motility Disorders ; Paralysis

The authors report jerky seesaw nystagmus, extorsional downbeating in the ipsilesional eye and intorsional upbeating in the contralesional eye, in a patient with internuclear ophthalmoplegia (INO) from focal pontine lesion. This pattern of nystagmus may occur by disrupting pathways from contralateral posterior and anterior semicircular canals by a lesion in the medial longitudinal fasciculus. Depending on the pathways involved, various patterns of dissociated torsional-vertical nystagmus may accompany INO.
Humans ; Ocular Motility Disorders* ; Semicircular Canals