Introducing the Critical-Line^TM Quantum LED from Good-Lite 

The Critical-Line^TM Quantum LED from Good-Lite is a vision screening device for children aged 3 through high school. The design streamlines the process, requiring only one person to conduct thorough screenings.

With the Critical-Line^TM Quantum LED, variables such as illumination on the chart face and chart viewing angle are effectively eliminated, ensuring accurate and reliable results with every screening. Say goodbye to the hassle of adjusting lighting conditions or struggling with viewing angles.

Product History

The Critical-LineTM Quantum from Good-Lite was first developed in 2024 after the gleaming success of the Insta-Line Quantum Developed by Good-Lite in the early 1970s…The modern Critical-LineTM Quantum LED Device follows recommended guidelines as the reason for development. Unlike Insta-Line the Critical-LineTM measures the visual acuity with critical line by age. The Insta-Line does not follow recent recommended guidelines.