Antique Eye Chart Used in Old Ophthalmology Clinics Material: Wood This is a very rare item, a wooden board resembling a battledore (a type of Japanese racket) with a paper chart embedded in it, used to measure visual acuity based on distance and letter size. Size: Height: 35.5 cm Width: 14 cm It will take some time to ship. If you are interested, please feel free to ask any questions in the comments. Thank you.