Great question. Might sound weird to hear but an eye doctor can get a pretty good idea of a person's prescription without any communication. Instruments called autrefractors and retinoscopes can be used to determine the magnitude of a child's refractive error just by the way light is bent entering and exiting the eye. read more
someone I know was born with an eye that turned in toward the tear duct all the time, that's how they knew that she needed glasses to correct the lazy eye. She didn't have them as a baby, but as a toddler. read more
And the only way to help those processes along is to fit the child with corrective lenses, either eyeglasses or contacts. After a premature infant receives major treatment such as a corneal transplant, cataract surgery; or retinal procedure for ROP, corrective eyewear is not only essential, but ongoing. read more