The Use of the Pre-Op Prism Adaptation Test (PAT) in the Surgery of Exotropia

Ron, A. García; Merin, Saul

doi:10.1080/0065955x.1988.11981778

Cited by 25 publications

(13 citation statements)

References 3 publications

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“…18 It is also recommended (1) that the deviation be measured while the patient fixates on an outdoor target, (2) that monocular occlusion be achieved in patients with exotropia before deciding on the amount of surgery, and (3) that intervention should be performed for the largest angle measured. The use of more accurate methods, such as the preoperative prism adaptation test, for determining the preoperative deviation in exotropic patients was shown to improve surgical outcome.…”

Section: Discussionmentioning

confidence: 99%

Factors influencing the outcome of strabismus surgery in patients with exotropia

Gezer

Sezen

Nasri

et al. 2004

Journal of American Association for Pediatric Ophthalmology and

108

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Section: Discussionmentioning

confidence: 99%

Factors influencing the outcome of strabismus surgery in patients with exotropia

Gezer

Sezen

Nasri

et al. 2004

Journal of American Association for Pediatric Ophthalmology and

108

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“…Several authors have suggested a role for prism adaptation to determine the latent angle and the angle of strabismus for surgical planning in patients with intermittent exotropia. [10][11][12][13] Kushner 3 suggested that the surgery should be performed for the largest deviation obtained with outdoor measurement. Our idea was that this principle could be extended to patients who show variable angles at different visits.…”

Section: Discussionmentioning

confidence: 99%

‘Largest angle to target’ in surgery for intermittent exotropia

2005

Eye

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Purpose To evaluate the safety of the approach based on the notion that the surgical dose for intermittent exotropia should be based on the largest angle ever measured. Design Prospective case series of 33 patients. Methods A total of 33 patients with intermittent exotropia, in whom angles of misalignment at distance or near showed a difference of 15 prism diopters (PD) or more among visits, were included. All the patients were treated by bilateral lateral rectus recession by the same surgeon (JMH), and all were followed up for a minimum of 6 months postoperatively. Short-and long-term surgical results after the initial procedure for intermittent exotropia were analysed. Results The short-term average result at a postoperative 1 week was 9.3 PD esotropia at distance (range 30 esotropia -16 exotropia). The long-term average results postoperative 6 or 9 months were 4.8 PD exotropia at distance (range 12 esotropia -30 exotropia). At the last follow-up, no overcorrection over 2 PD esophoria at distance was found, and 9 PD of intermittent esotropia and esophoria at near was observed in two patients, respectively. Conclusions The strategy of surgical dose for intermittent exotropia based on the largest angle ever measured did not result in overcorrections and is believed to be safe.

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“…3 Shorter preoperative prism adaptation tests have been reported. [8][9][10][11][12] Altman et al 8 found motor stability in 94% of 30 subjects prism-adapted at the 24-hour preoperative visit. Subjects remained stable on the day 4 and day 7 visits.…”

mentioning

confidence: 98%