We interviewed Hans Lessmann, OD, FCOVD, FCSO about syntonics. You can sign up for the replay below:

Syntonics, also known as optometric phototherapy, is a non-invasive form of light therapy.

In conjunction with vision therapy, syntonics can help reverse visual dysfunctions such as:

  • Strabismus (eye turn)
  • “Lazy” eyes
  • Convergence issues
  • Divergence issues
  • Focusing issues

These symptoms are typically seen in children with neurodevelopmental disorders such as:

  • Autism
  • ADHD
  • Learning disabilities
  • Sensory Processing Disorder

Syntonics can also help those with:

  • Emotional issues
  • Behavioral issues
  • Lyme disease
  • Traumatic Brain Injury
  • Migraines
  • Other neurological diseases and disorders


Dr. Hans F. Lessmann, Executive Director of the Vision Development Institute, is a Board Certified Fellow in both Vision and Light therapy by the College of Optometrists in Vision Development and the College of Syntonic Optometry.

He has won numerous awards, including being named Pennsylvania’s Optometrist of the Year in 2003.

He enjoys solving complex vision and developmental problems for all ages from infancy to late adulthood.

Dr. Lessmann is the father of a daughter with Down syndrome and understands the concerns of children with special needs and their parents.

Date & Time

  • Thursday, March 29, 2018 1:00 pm