Role of fusional convergence amplitude in postoperative phoria maintenance in children with intermittent exotropia
| Autor: | Rika Takahashi, Akemi Wakayama, Yoshikazu Shimomura, Fumiko Matsumoto, Kosuke Abe, Fumi Tanabe, Yukari Seki, Ikumi Umebara |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Male medicine.medical_specialty Adolescent Visual Acuity Ophthalmologic Surgical Procedures 03 medical and health sciences 0302 clinical medicine Break point Ophthalmology medicine Humans Cover test Postoperative Period Child Retrospective Studies Diplopia Vision Binocular business.industry Mean age General Medicine Convergence Ocular medicine.disease 030104 developmental biology Amplitude Oculomotor Muscles Chronic Disease 030221 ophthalmology & optometry Exotropia Female medicine.symptom business Intermittent exotropia |
| Zdroj: | Japanese journal of ophthalmology. 62(3) |
| ISSN: | 1613-2246 |
| Popis: | To examine the role of fusional convergence amplitude in postoperative phoria maintenance in childhood intermittent exotropia [X(T)]. The medical records of 29 children aged 15 years or younger (mean age, 10.8 ± 2.4 years) and treated with monocular recession-resection for X(T) were reviewed retrospectively. The patients’ fusional convergence amplitude (break point/total amplitudes), physiologic diplopia, and phoria maintenance (presence/absence of phoria maintenance and ability to maintain phoria) were assessed. The presence of phoria maintenance was confirmed by a cover test, and the ability to maintain phoria was quantified using the Bagolini red filter bar. Correlations of the amplitude size with the presence and ability of phoria maintenance were investigated. A significant correlation was seen between fusional amplitude (break point/total) and ability to maintain phoria at near and at far (break point: P < .05 at near/P < .01 at far; total: P < .05 at near/far). Neither the break point amplitude nor the total amplitude significantly differed between the patients with phoria maintenance and those without it (break point: P = .71 at near, P = .29 at far; total: P = .98 at near, P = .85 at far). Phoria maintenance correlated with the suppression of physiologic diplopia during phoria (P < .01). The deviation angle did not significantly correlate with fusional amplitude either at near (P = .58) or at far (P = .27). In childhood X(T), fusional amplitude plays a role in enforcing the patient’s ability to maintain phoria. However, sufficient fusional amplitude does not guarantee fully functioning fusion if suppression is present during phoria. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink