The optometrists vision test tool is for both and portable use. Its lightweight and ergonomic design make it easy to handle during patient examinations. This eye occluder is a must-have for any practice, providing reliable performance in assessing visual acuity and diagnosing vision issues. Features -Color:Black -Material:Pp -Size: 19.30X6.20X1.40cm/7.58X2.44X0.55in - testing: this tool ensures accurate vision measurements, enhancing the effectiveness of eyewear prescriptions -Plastic eye occluder: the meticulously designed eye shield addresses light interference issues during eye exams -Optimal: the design ensures external light is blocked, creating a precise environment for vision tests -Suitable for various settings: It's for optical shops and eye clinics, facilitating use by eye care professionals -Convenient portability: lightweight and easy to transport, enabling eye examinations to meet diverse needs Package list: 6 x Handheld Eye Occluders