Accommodative function in adolescent hyperopic anisometropes

Objective To investigate the accommodative lag and accommodative amplitude in the adolescent hyperopic anisometrope and to compare the differences of them between the dominant and non-dominant eyes. Methods The accommodative lag and amplitude of dominant and non-dominant eyes were assessed in 63 cases of school-age subjects [18 hyperopic anisometropes with a refractive error of (3.5±0.9)D and an age range of 6.5～15(10.5±2.6)years; 25 hyperopes with a refractive error of (4.5±2.3)D and an age range of 7～14(9.8±2.4)years and 20 emmetropes with an age range of 7～12(9.5±2.6)years. Accommodative lag was assessed using MEM dynamic retinoscopy and accommodative amplitude was assessed with a push-up test. The binocular vision function was studied at the same time. Results The accommodative amplitude and lag of the dominant eyes were (13.3±3.2)D and (0.79±0.39)D in the 18 hyperopic anisometropic patients. There was no significant difference in the accommodative lag and amplitude of the dominant eyes between the anisometropes and the hyperopic and emmetropic groups. The accommodative amplitude and lag of the non-dominant eyes were (11.3±3.3)D and (1.10±0.12)D in the anisometropic group. The accommodative lag of the non-dominant eyes in the anisometropic group was greater than that of the hyperopic and emmetropic groups (t=2.79,P=0.03; t=2.95,P=0.02). Both the accommodative lag and amplitude between the dominant and non-dominant eyes were significantly different in the anisometropic group (t=3.12,P=0.006; t= 4.10,P =0.001). The accommodative lag of the dominant eyes in patients with amblyopia was greater than that of patients without amblyopia (t=2.43,P=0.027),while the accommodative lag of the non-dominant eyes was not significantly different (t=0.78,P=0.45). Conclusion The accommodative function (accommodative lag and amplitude) of the dominant and non-dominant eye has significant differences in the adolescent hyperopic anisometrope. There is an accommodative dysfunction in the non-dominant eye.