Comparative analysis of the motor behavior regarding the effectiveness between bifocal flat top and progressive lens in easy-going endotropy with high AC/A

Abstract

The effect of the bifocal glasses in children with increased rates of AC/A has been an effective method to control far-sighted endotropy. However, with the state of the art progressive lenses which are especially designed to compensate for far-sighted visual alterations produced by the excessive accommodation and convergence.[there’s something missing here.] The potency of the progressive glass varies without adequate discontinuity for the long, intermediate, and short vision. The potency of this multi-focal glass provides a bigger visual field and it doesn’t interrupt the special visual perception. The changes in the potency are gradual and continuous in any direction with a minimum of distortion. The progressive lenses alter the progressive length and the off-center for close vision according to the different diopter values of the patient. Therefore it will offer a major guarantee against the fusion of images at any distance and develop bi-ocular vision in children with endotropy with a high AC/C. In Colombia this was the first research done with this type of lens and was an important contribution to Ophthalmology, specially in the field of the orthoptics and the treatment of convergent strabismus with high AC/A in children.