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14.06.2019 | Pediatrics | Ausgabe 9/2019

Graefe's Archive for Clinical and Experimental Ophthalmology 9/2019

High-dose Anderson operation for nystagmus-related anomalous head turn

Zeitschrift:
Graefe's Archive for Clinical and Experimental Ophthalmology > Ausgabe 9/2019
Autoren:
Michael Gräf, Anja Hausmann, Birgit Lorenz
Wichtige Hinweise

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Abstract

Purpose

To evaluate the effectiveness of a high-dose Anderson procedure (AP) to correct infantile nystagmus–related anomalous head turn (HT).

Methods

Twenty-nine consecutive orthotropes with infantile nystagmus with and without associated sensory defect received high-dose AP. HT was measured while the patient tried to read letters at best-corrected visual acuity (BCVA) level at 5 m and 0.3 m. BCVA, binocular vision (BV), and alignment (prism and cover test) were measured. High-dose AP with recessions of 9–16 mm was performed. All measures were taken before and 3–6 and ≥ 8 months post surgery. Success was defined by postoperative HT ≤ 10°/HT ≤ 15°.

Results

Medians and ranges (minimum-maximum) were:. Age at surgery was 7 years (4–44). HT at 5 m and HT at 0.3 m were 35° (20–40) and 20° (0–35), respectively. After 4 months (3–6), HT was 10° (− 3–20) and 5° (− 5–20); success rates were 74%/96% and 83%/96%. After 15 months (8–45), HT was 12° (0–20) and 6° (0–15); success rates were 46%/75% and 92%/100%; residual HT > 15° occurred in 5/9 cases with recessions < 13 mm and 1/15 cases with recessions ≥ 13 mm. With recessions ≥ 13 mm, 60% (95% confidence intervals (C.I.), 33–83%) achieved HT ≤ 10° and 93% (95% C.I. 66–99%) achieved HT ≤ 15°. Overcorrection did not occur. Anomalous head posture components in vertical and frontal planes did not improve. Residual motility was 30° (10–45). The mean BCVA improved by only 0.037 logMAR (p = 0.06). BV and ocular alignment were constant, except in 2 patients whose exophoria decompensated.

Conclusions

Kestenbaum surgery is a common procedure to correct infantile nystagmus–related HT. Anderson surgery is confined to bilateral yoke muscle recession; hence, less invasive but nevertheless comparably effective, high dosage is provided.

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