It evokes an intense light beam as it looks at the eye. An organism used to view the cornea, iris, lens and vitreous (sections of the eye which bend the sun) is a Biomicroscope or split lamp. The amount of kids in the ETDRS diagram was reduced. Charts for 17 kids aged 4–9 years are testably available. The main result for Experiment 1 was the direct comparison of the VA measures in focused conditions between Kay Photos, Lea Symbols, HOTV and Keeler logMAR. Other pediatric diagrams give more similar VA interventions and should be used to advance kids to letter diagrams. Lea Symbols Eye Chart Printable