Table 2.

Hospital based and home-based orthoptic therapy procedure

Phase	Therapy location	Training technique	Endpoint
Phase 1	Hospital-based therapy	Training with major amblyoscope to build fine retina correspondence	Achieve simultaneous vision and build fusion
		Cheiroscopic drawing with single oblique stereoscope	Achieve simultaneous vision and build fusion
		Vectograms (quoits or clowns) for convergence	33 BO for twice for patients without stereopsis
		Increasing fusional convergence based on stereoscopic stimuli	34 BO for twice for patient with stereopsis
	Home therapy	Red/green bar reader	Maintain single binocular without suppression
		Barrel card	Easily fuse three dots
		Brock string	Successfully converge to 2.5 cm from his or her nose.
		Letter chart monocular accommodative facility (MAF)	Start from 20/50, go to 20/40 or 20/30, when result of MAF is 17.5 cpm
Phase 2	Hospital-based vision therapy	Training with major amblyoscope to increase fusional convergence	Fusional convergence reserve is more than +25° (based on different subjective angle of exodeviation, the amount of fusional convergence demand is different)
		Vectograms (quoits or clowns) for divergence	15 BI with stereopsis
		Aperture rule for convergence and divergence	12 pictures for convergence, 7 pictures for divergence.
		Random vergence facility based on stereoscopic stimuli	More than 650 times in 15 minutes
	Home-based vision therapy	Aperture rule	7 for divergence and 12 for convergence
		Letter chart BAF	More than 17.5 cpm (20/30)
		Computerized binocular vision therapy procedure	Achieve clear single binocular vision with 40 to 50 BO and 10 to 15 BI.
Phase 3	Hospital-based vision therapy	Training with major amblyoscope to increase fusional convergence	Fusional convergence reserve is more than +25° (based on different subjective angle of strabismus, amount of fusional convergence demand is different)
		Aperture rule with lens or prism flipper	Accomplish with ±2.00 lens flipper
		Random vergence facility based on stereoscopic stimuli	More than 650 times in 15 minutes
		Bernell-O-Scope for vergence facility	8 pictures for BI and BO each
		Free space fusion with lifesaver card	Easily accomplish convergence and divergence
		VR training that combines pursuit and saccade	Accuracy ratio more than 90% in increasing difficulty
	Home-based vision therapy	Aperture rule with ±2.00 lens flipper	Accomplish 7 in divergence and 12 in convergence
		Lifesaver card	Easily accomplish divergence and convergence

BO base out, BI base in, BAF binocular accommodative facility, cpm cycles per minute, VR virtual reality