Entropion-ectropion: the influence of axial globe length on lower eyelid malposition.

PURPOSE: To evaluate the effect of axial globe length and other biometry parameters on age-related lower eyelid malposition.

METHODS: Consecutive patients with involutional lower eyelid malposition underwent preoperative biometry with Zeiss IOL Master and Hertel's exophthalmometer prior to surgery. Patients with other causes of eyelid malposition and thyroid eye disease were excluded. GraphPad InStat was used for t test and chi-square statistical analysis.

RESULTS: Data on 57 eyelids of 52 Caucasian patients were collected. There were 28 ectropions and 29 entropions. The mean axial globe length in the ectropion group (23.5 mm, standard deviation ± 0.9) was significantly longer than in the entropion group (22.7 mm, standard deviation ± 1.03) (p = 0.008). There was significant sex predilection, with entropion more common in women and ectropion more common in men (p = 0.03). The mean axial globe projection in the ectropion group was 16.6 mm (standard deviation ± 2.4) and in the entropion group was 14.6 mm (standard deviation ± 2.7) (p = 0.002). There was no statistical difference in age, keratometry, amount of astigmatism, and cylinder axis.

CONCLUSION: Involutional eyelid malposition directly correlates with axial globe length with the ectropion group having lengthier eyes compared with the entropion group. Hence, axial globe length could be an influential factor in the onset of involutional eyelid malposition.