reflex

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This results in constant red reflex and high contrast visualization without compromise for main surgeon or the assistant.
Health visitors commonly detect squints and, of course, only a very small fraction will be due to retinoblastoma, but it is important to ensure that all squints are checked with a red reflex test.
An oplathalmologist recorded that the red reflex was intact bilaterally and the corneas were clear.
Despite the American Academy of Pediatrics' policy on even minimal red reflex testing, fewer than 22 percent of all preschool children receive any type of vision screening at all.