5144   Delta Base-Out Training Unit

Vision therapy for reading-related eye fatigue and premature presbyopia, diminished focusing ability usually due to aging. Treats exophoria (overconvergence, being "wall eyed") and other convergence issues, including advanced strabismus (being "cross eyed"). 

Keystone View base-out units simulate normal environmental demands on the eyes and can aid patients in accepting new lens prescriptions, particularly bifocals.

• Includes 12 photo scene and jump-fusion stereo targets and a patient's manual


• Words and letters on targets enhance patient motivation


• Maximum prismatic effects at infinity are 30 BO and 5 BI; at near point, 27 BO and 29 BI