These eye are essential tools for optometrists and ophthalmologists to evaluate visual acuity. Allows accurate measurement of visual acuity. These eye can be used to evaluate visual acuity in both children and adults, both functional and practical. Features -Color:Assorted Color -Material:PVC -Size:20.00X10.00X0.10cm/7.86X3.93X0.04in - These eye are crafted from flexible PVC material, and lightweight, easy to use. - Portable and easy to store, making it a practical tool for use in multiple settings. - Simple structure design, easy to use, clear handwriting, easy to identify, useful and practical. - Perfect eye care present for optometrists, eye care , , eye care , optician, eyeglasses makers and so on. - Includes Red and Green color pattern for testing. Great testing tool for you to use. Package list: 2 testing