Binocular balancing

After completion of monocular subject refraction, binocular balancing is performed to balance the state of accommodation between two eyes. Binocular balancing aims to balance the state of accommodation of the two eyes. The procedure ensures that a person exerts the same amount of accommodation through distance correction while viewing a near target. During monocular refraction, … Read more

Bichrome prism dissociated method

bichrome binocular balancing

The prism dissociation and alternate occlusion test are only used when both eyes have similar monocular visual acuity. If monocular corrected visual acuity is not the same for both eyes, the bichrome prism dissociated method is used. Procedure of bichrome binocular balancing Kamal ThakurLecturer (Nethradhama School of Optometry) Moptom

Alternate occlusion method: 

This differs from the vertical prism dissociation method, instead of using prisms in both eyes, eyes are dissociated using occlusion. A paddle occlude is used for occlusion of the eye (occluder which is used in the cover test) which allows to shift occlusion from one eye to another easily and rapidly. Procedure of alternate occlusion … Read more

Vertical prism dissociation method

binocular balancing test

The procedure makes use of prisms to break the fusion between two eyes. The vertical prisms of the same amount are used to maintain equal degradation of image quality which is caused by prism. Don’t use horizontal prisms, as a compensatory positive and negative fusion vergence will make it difficult to break fusion or very … Read more