Pantano R.

Orthoptic treatment of convergence insufficiency: A two year follow-up report.

American Orthoptic Journal, 57: 73-80, 1982.

Pantano studied 207 subjects with convergence insufficiency who underwent vision therapy and evaluated them 2 years later. The majority remained asymptomatic with normal clinical findings. Those subjects who learned to control convergence and accommodation together had the best success.