Know The Glow ®


Know the Glow is a global nonprofit leader in identifying preventable glow-related childhood eye diseases.

We empower parents to see their child’s vision in a new light by raising awareness about The Glow (medically known as leukocoria) and encouraging them to make sure their young children receive comprehensive eye exams by an eye specialist.

When caught early, more than 80% of all childhood blindness is preventable


Share Your Glow Story

80% of the time a parent
or family member is the
first to identify “The Glow”
in a child’s eye.


80% of all childhood blindness is
preventable or curable.


1 in 80 children may show the glow
before age nine.

Glow Videos

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Glow Identification

Know The Glow


Diseases common to “The Glow”:

  • Amblyopia
  • Brown Syndrome
  • Cataract
  • Choroidal Osteoma
  • Coats’ Disease
  • Coloboma
  • Congenital Cataract
  • FEVR
  • Intraocular Medulloepithelioma
  • Norrie Disease
  • PHPV
  • Refractive Error
  • Retinal Detachment
  • Retinal Dysplasia
  • Retinopathy of Prematurity (ROP)
  • Retinoblastoma
  • Strabismus
  • Toxocariasis
  • Trauma


Glow of the Month

Glow of the Month: Persistent Fetal Vasculature (PFV)

Posted on 2018-12-11

“The Glow” can be a sign of nearly 20 different eye conditions and diseases — many of which can ultimately cause permanent partial or full vision loss. “The Glow” is a white or golden reflex that sometimes looks like a cat-eye reflex. It’s scientific name is “Leukocoria”. Read more about detecting “the Glow” in this… Read more »

Life, well-lived 

Posted on 2018-12-04

In November, Know The Glow received two stories from women diagnosed with retinoblastoma, one in the 1930s and the other in 1960s. Separated by a generation, both were diagnosed at 18 months of age and have gone on to live long, happy lives following having their eyes enucleated. They were eventually fitted with prosthetic eyes. Fiona, who… Read more »

Giving Thanks

Posted on 2018-11-27

When a child is diagnosed with an eye-condition or disease, their whole world can be upended. They can go from normal, happy child to a never-ending sequence of doctors visits, surgeries, physical therapy and, at times, chemotherapy. This unhappy process is often made “survivable” by the teams of doctors, nurses, optometrists, family and friends who… Read more »