RT Journal Article
T1 Binocular function changes produced in response to overnight orthokeratology
A1 Felipe Márquez, Gema
A1 Nombela Palomo, María
A1 Palomo Álvarez, Catalina
A1 Cacho Bobillo, Isabel
A1 Nieto Bona, Amelia
AB Purpose: To analyze the binocular function changes produced on subjects undergoing overnight orthokeratology (OK) treatment over short-term (3 months) and long-term (3 years) wear.Methods: A prospective, longitudinal study on young adult subjects with low to moderate myopia was carried out. Binocular function was assessed by the following sequence of tests: Distance and near horizontal phoria (Von Graefe technique), distance and near horizontal vergence ranges (Risley rotary prisms), accommodative convergence/accommodation (AC/A) ratio (gradient method) and the near point of convergence (standard push-up technique). The short-term sample consisted of: 21 subjects in the control group, 26 in a corneal refractive therapy (CRT) treatment lenses group and 25 in a Seefree treatment lenses group. Those subjects were evaluated at baseline and at a 3-month follow-up visit. Twenty one subjects were old CRT wearers that attended a 3-year follow-up visit (long-term group).Results: A statistically significant difference over the 3-month treatment was found for divergence at distance: the break point decreased 1.4 Δ (p = 0.0006) in the CRT group and the recovery point increased 1.2 Δ (p = 0.001) in the Seefree group. Also, the Seefree group had an exophoric trend of 2.3 Δ at near (p = 0.02) and a base-out break decrease of 2.3 Δ (p = 0.03). For the long-term group, only the base-out break point at distant vision showed a statistically significant difference of 4.9 Δ (p = 0.02).Conclusions: OK induces minimal changes in the binocular function for either short-term or long-term periods, apart from a near exophoric trend over the short-term period.
PB Springer
SN 0721-832X
YR 2017
FD 2017-01
LK https://hdl.handle.net/20.500.14352/18026
UL https://hdl.handle.net/20.500.14352/18026
LA eng
NO Received: 19 April 2016 /Revised: 7 August 2016 /Accepted: 7 November 2016 /Published online: 21 November 2016
DS Docta Complutense
RD 30 abr 2024