SAN FRANCISCO—The start-up Vivid Vision, which has developed a virtual reality (VR) tool to help treat binocular vision disorders, or lazy eye, has raised $2.2 million in a seed round of funding, the company announced last week.

Investors included Jeff Clavier of SoftTech VC, who led the funding round, and The Venture Reality Fund, CRCM Ventures, SOS Ventures, Anorak Ventures and Liquid 2 Ventures, a seed-stage venture capital firm co-founded by Hall of Fame NFL quarterback Joe Montana, according to a Vivid Vision announcement.

Vivid Vision launched the clinical vision therapy suite to optometrists and ophthalmologists in late 2015. More than 6,000 patients have been treated at more than 90 clinics across the world, the company said. The average course of treatment lasts eight months with patients visiting a clinic one to two times per week to use the VR system.

“Our goal with this new round of funding is to expand and accelerate our vision care platform,” the company said in its announcement. “Although the treatment is currently only available in clinics under the supervision of a trained eyecare professional, we anticipate releasing our home version of the treatment, Vivid Vision Home, later this year.”

Vivid Vision Home will run on both desktop and mobile virtual reality platforms. It requires a prescription from an ECP, according to Vivid Vision.

Chief executive officer James Blaha said the company has partnered with “the best optometrists, ophthalmologists and vision scientists to make this a reality.” Blaha, a programmer and lifelong sufferer of lazy eye, started the company after experimenting on himself, according to the company’s website.

Vivid Vision noted that more than 10 percent of Americans suffer from one or more binocular vision disorders, which include amblyopia, strabismus or convergence insufficiency. These disorders, commonly known as lazy eye and crossed eyes, cause issues with driving, playing sports and even limit career choices, the company said.