However, in cases where an exophoria remains decompensated with full correction, a myopic overcorrection can be considered if the patient has adequate accommodative amplitude
(see Figure 1).
Researchers have suggested that various oculomotor factors may be related to the development, progression, and stabilization of myopia including poor accommodative response [2-8], decreased accommodative tonus , decreased accommodative amplitude
, reduced accommodative facility [11-13], increased accommodative adaptation , increased accommodative variability , near phoria , and AC/A ratio [8,17,18].
Accommodative responses, including both monocular and binocular accommodative amplitude
, accommodative convergence to accommodation ratio, and negative and positive relative accommodation, were reduced in the TBI population compared with normative values.
In particular, the paper states longitudinal studies that consider the interaction between the preferred reading distance and the change in accommodative amplitude
across time for males and females could help determine to what extent biological factors or environmental factors plays a role in the loss of focusing ability with increasing age.he study has been published in Investigative Ophthalmology and Visual Science.
Secondly, children with lower baseline accommodative amplitude
showed a 56% better myopia control response to OK contact lens wear compared to normal accommodators, in a two-year study.
Monocular accommodative amplitude
(AA) with push-up method [59, 60].
Many of the earlier studies employed accommodative amplitude
as the primary or sole index of accommodative dysfunction.
(14-18) While there is conjecture as to whether accommodative inaccuracy is a feature rather than a cause of myopia, (19) children with insufficient accommodation exhibited as either lag or lower baseline accommodative amplitude
have shown greater myopia control results with progressive addition lenses and orthokeratology than myopes with normal accommodative function.
The potential accommodative amplitude
of passive-shift IOLs is dependent upon the power of the implant (and therefore the patient's refractive error).
(37) In adult patients undergoing refractive surgery, a study showed no significant difference in cycloplegic refraction between tropicamide 1% and cyclopentolate 1%.38 In the same patients, however, the study showed that cyclopentolate was more effective than tropicamide in reducing accommodative amplitude
in adult myopes (near-point testing).