Screen with one-button touch from 14" away. Five-second, automatic test addresses compliance problems and makes testing easier. Minimal cooperation is required, making it ideal for use with young children. The lights and sounds engage the child's attention. Automatically measures and indicates abnormal readings. Addresses eye charts' sensitivity and specificity problems. Automatically screens for common vision problems, including near- and farsightedness, astigmatism, and anisometrophia. Hand-held unit operates for three hours of continuous testing. Available battery-operated printer enables you to get print-outs anywhere, anytime. Weighs two lbs. and features an ergonomic grip and replaceable, self-adjusting hand strap. Features optics and electronics shock-mounted inside housing to protect unit. The sealed unit helps keep out dirt. Screens babies, children, and adults. You can even test patients while they're wearing glasses or contact lenses.