Skip to main content

Up to five percent of preschool children have serious vision abnormalities or risk factors for amblyopia, more commonly called lazy eye.1 If amblyopia is not detected, diagnosed and treated before age four, it can lead to permanent vision loss or blindness.2 With photoscreening technology, pediatricians can detect risk factors earlier, quicker and more accurately than with a traditional eye chart. 3 4 Endorsed by medical societies including the AAP, AAO, AAPOS and AACO, photoscreening ensures that pediatric patients get the vision care they need when they need it.5

The Science Behind iScreen

For pediatric practices, using the iScreen device is simple. Staff members can quickly snap a picture of a patient and upload it to the cloud with one keystroke. Five minutes later, they receive a comprehensive report on iScreen’s secure customer portal, which includes information about whether the patient is at risk for potentially serious vision abnormalities and needs to visit an ophthalmologist or optometrist. 

Behind the scenes, the iScreen Vision Screener 3000 works by using a sophisticated set of rapidly timed flashes at different angles. This enables the device to digitally capture “red reflex” images of the eye. If the patient has potential vision issues, the light pattern captured in the image will vary.

Once the picture is taken, software performs an initial analysis of the image. Other vision screening devices stop here. But with iScreen, the picture next goes to one of our certified ophthalmic professionals who each analyze tens of thousands of images each year. This off-site analysis of every patient screening is unique to iScreen, ensuring a high degree of quality control compared to devices that only depend on automated analysis. When you receive your iScreen report, you can be confident in the results, knowing they were determined by professionals with years of ophthalmological experience.

Vision Disorders & Irregularities

iScreen Vision screens for refractive errors, alignment problems and other abnormalities that could lead to vision loss, including:



Unequal pupil size.


The condition in which the two eyes have unequal refractive power. One eye may be myopic (nearsighted) and the other hyperopic (farsighted) or one eye may be markedly stronger than the other.


A defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus.


A medical condition in which the lens of the eye becomes progressively opaque, resulting in blurred vision.


A congenital malformation of the eye causing defects in the lens, iris, or retina.


A condition in which visual images come to a focus behind the retina of the eye and vision is better for distant than for near objects : Farsightedness.


A condition in which the visual images come to a focus in front of the retina of the eye resulting especially in defective vision of distant objects : Nearsightedness.


The drooping of the upper eyelid due to paralysis or disease, or as a congenital condition.


When the eyes are misaligned, or not lined up properly, and don't look in the same direction at the same time. One eye may look straight ahead while the other eye turns in, out, up, or down. It is more commonly referred to as "crossed eyes."


  1. Braverman, RS. Introduction to Amblyopia. American Academy of Ophthalmology.
  2. US Preventive Services Task Force. Vision screening for children 1 to 5 years of age: US Preventive Services Task Force Recommendation statement. Pediatrics. 2011 Feb;127(2):340-6. doi: 10.1542/peds.2010-3177.
  3. Salcido AA, Bradley J, Donahue SP. Predictive value of photoscreening and traditional screening of preschool children. J AAPOS. 2005 Apr;9(2):114-20.
  4. Paysse EA, Williams GC, Coats DK, Williams EA. Detection of red reflex asymmetry by pediatric residents using the Brückner reflex versus the MTI photoscreener. Pediatrics. 2001 Oct;108(4):E74.
  5. Donahue SP, Nixon CN; Section on Ophthalmology, American Academy of Pediatrics; Committee on Practice and Ambulatory Medicine, American Academy of Pediatrics; American Academy of Ophthalmology; American Association for Pediatric Ophthalmology and Strabismus; American Association of Certified Orthoptists. Visual System Assessment in Infants, Children, and Young Adults by Pediatricians. Pediatrics. 2016 Jan;137(1):28-30.