Long-term outcome of uncomplicated infantile exotropia

Hunter, David G.; Kelly, Jane Barrett; Buffenn, Angela N.; Ellis, Forrest J.

doi:10.1067/mpa.2001.120175

Cited by 66 publications

(45 citation statements)

References 8 publications

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“…Neither monkey had a dissociated vertical deviation. This feature is classically associated with infantile esotropia but can also occur with exotropia in humans (Hunter et al 2001) and monkeys . Had more monkeys been studied, an animal with dissociated vertical deviation might have been encountered.…”

Section: Discussionmentioning

confidence: 99%

Ocular Motor Behavior in Macaques With Surgical Exotropia

Economides

Adams²,

Jocson³

et al. 2007

Journal of Neurophysiology

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Economides JR, Adams DL, Jocson CM, Horton JC. Ocular motor behavior in macaques with surgical exotropia. J Neurophysiol 98: 3411-3422, 2007. First published October 10, 2007 doi:10.1152/jn.00839.2007. To provide an animal model of human exotropia, a free tenotomy of the medial recti was performed in two infant macaques. When the animals were old enough to record eye movements with video eye trackers, we measured their ductions, ocular alignment, comitance, smooth pursuit, fixation preference, and gaze stability. Partial recovery of adduction occurred in each monkey from spontaneous re-attachment of the medial rectus muscle to the eye. However, each animal was left with a relatively comitant, large angle exotropia. The magnitude of the exotropia was not affected by covering one eye. There was no dissociated vertical deviation or any significant "A" or "V" pattern to the horizontal misalignment. Smooth pursuit was more accurate when tracking nasally compared with temporally in both animals. Compensatory catch-up saccades in the tracking eye were always accompanied by conjugate movements in the deviated eye. Despite tenotomy of the medial recti, the velocity of adducting saccades was normal. Both monkeys alternated fixation, preferring to use the left eye for targets on the left side and the right eye for targets on the right. Each animal was capable of switching fixation while making accurate saccades. One of the monkeys developed a vertical pendular nystagmus, which was most prominent in the deviated eye. Macaques with ocular misalignment from medial rectus tenotomy exhibit features that are present in humans with alternating exotropia. These animals will be valuable for probing the cortical mechanisms that underlie visual suppression in strabismus.

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Section: Discussionmentioning

confidence: 99%

Ocular Motor Behavior in Macaques With Surgical Exotropia

Economides

Adams²,

Jocson³

et al. 2007

Journal of Neurophysiology

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“…We believe the patients in group 1 were classified into infantile intermittent exotropia. [7][8][9] In this study, tendon widths of patients under 5 years old were narrower than those of other groups. However, no statistically significant difference was observed between groups who were 5-13 years old and older than 13 years old.…”

Section: Discussionmentioning

confidence: 80%

The tendon width of lateral rectus muscle in predicting the effect of recession: is it just age-related artifact?

2011

Eye

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Purpose The tendon width of the lateral rectus muscle is known to be a useful indicator for estimation of the effect of lateral rectus recession in intermittent exotropia. This study was conducted to investigate whether the tendon width of the lateral rectus would differ according to different age groups. Patients and methods We studied 133 patients ranging from 0 to 51 years of age who had undergone bilateral lateral rectus (BLR) recession for the basic type of intermittent exotropia. A total of 133 patients were divided into four groups; 16 patients who were younger than 2 years old (group 1), 20 patients who were 2-5 years old (group 2), 75 patients who were 5-13 years old (group 3), and 22 patients who were older than 13 years (group 4). Under general anesthesia and before dissection of the muscle tendon from the sclera, the tendon width of the lateral rectus of both eyes near insertion was measured with calipers. Results The tendon width of each group was as follows: in group 1, 7.84 ± 0.35 mm in the right eye and 7.66 ± 0.44 mm in the left eye; in group 2, 7.70 ± 0.50 mm and 7.65 ± 0.52; in group 3 8.11 ± 0.36, 7.95 ± 0.48. In group 4, measurements were 8.14±0.49 mm and 8.05±0.38 mm, respectively. The difference of tendon width in both eyes was statistically significant in all four groups (Po0.01) and the tendon widths of group 1 and 2 were narrower than that of group 3 and 4. Conclusion Measurement of tendon width of the lateral rectus muscle for prediction of the effect in intermittent exotropia should be applied in patients Z5 years of age.

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“…Sugerem que sejam realizados estudos com maiores casuísticas e melhores avaliações pré e pós-operatórias Pós-operatório final= 6 meses; p 1 = pré-operatório x pós-operatório imediato; p 2 = pré-operatório x pós-operatório final; p 3 = pós-operatório imediato x final; *= teste t pareado; **= teste t Student; ***= teste t pareado; ****= teste Mann-Whitney Como mostra a tabela 4, obtivemos bom resultado em 12 dos 20 pacientes do grupo A (60%) e em todos os pacientes do grupo B (100%) no período pós-operatório imediato, diferença estatisticamente significante (p<0,05). Nosso resultado assemelha-se aos da literatura, que revela taxa de sucesso inicial variando de 60 a 80% (1)(2)(3)5) . Já no período pós-operatório final obtivemos 50% (10 pacientes) de bom resultado no grupo A e 82,3% (14 pacientes) no grupo B, diferença estatisticamente não significante (p=0,082).…”

Section: Comentáriosunclassified

“…Kampanartsanyakorn et al estudaram retrospectivamente 117 prontuários de pacientes portadores de exotropia essencial (15 a 50 Δ ) que foram submetidos à primeira correção cirúrgica de estrabismo e encontrou taxa de sucesso de 57%, sendo os melhores resultados alcançados nos pacientes com desvios pré-operatórios inferiores a 30 Δ (p<0,001) e operados antes dos 6 anos de idade (p<0,05) (1) . Hunter et al estudaram 6 pacientes portadores de XT no primeiro ano de vida, que foram submetidos à correção cirúrgica, e obtiveram taxa de sucesso de 83% (5 pacientes) em um ano de acompanhamento (5) . Biglan et al estudaram 8 pacientes portadores de XT submetidos à correção cirúrgica, com taxa de sucesso de 75% (2 pacientes reoperados).…”

Section: Introductionunclassified

Resultados da correção cirúrgica da exotropia permanente em pacientes amblíopes e não-amblíopes

Portes¹,

Franco²,

Tavares³

et al. 2011

Arq. Bras. Oftalmol.

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RESUMOA exotropia permanente (XT) acomete cerca de 1 a 2% da população. Seu tratamento é clínico: antiambliogênico e correção dos erros refrativos, e cirúrgico. O objetivo do tratamento cirúrgico é alinhar os olhos na posição primária do olhar, proporcionando melhor resultado estético. Há muito tempo diversos autores estudam os fatores pré, per e pós-operatórios relacionados ao resultado cirúrgico, uma vez que a taxa de sucesso varia de 60 a 80%. Ainda são poucos os estudos que comparam a presença de ambliopia como fator de influência no resultado final. Objetivo: Comparar o resultado cirúrgico dos pacientes amblíopes e não-amblíopes submetidos à cirurgia de correção de XT. Métodos: Análise retrospectiva de 37 prontuários de pacientes amblíopes (Grupo A) e não-amblíopes (Grupo B) submetidos à correção cirúrgica de XT por retrocessoressecção monocular, sendo avaliados os registros pós-operatórios imediatos e tardios. Idade: grupo A 24,7 ± 14,2 anos, grupo B 22,6 ±18,6 anos; Desvio pré-operatório: grupo A 29,1± 7,2 Δ , grupo B 28,4 ± 6,8 Δ . Resultados: A taxa de sucesso foi de 60% e 100% (p<0,05), no pós-operatório imediato e 50% e 82,3% (p=0,082), no pós-operatório final, nos grupos A e B, respectivamente. Não houve diferença significante quanto aos desvios pós-operatórios imediatos, tardios e variação do desvio. Conclusão: Pode-se concluir que o grupo B mostrou melhor resultado no pós-operatório imediato; porém não houve diferença no resultado cirúrgico de correção de exotropia permanente entre pacientes amblíopes e não-amblíopes no período pós-operatório de seis meses. Descritores

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Long-term outcome of uncomplicated infantile exotropia

Cited by 66 publications

References 8 publications

Ocular Motor Behavior in Macaques With Surgical Exotropia

Ocular Motor Behavior in Macaques With Surgical Exotropia

The tendon width of lateral rectus muscle in predicting the effect of recession: is it just age-related artifact?

Resultados da correção cirúrgica da exotropia permanente em pacientes amblíopes e não-amblíopes

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