3pcs Confirmation Flipper Set Glass ±25° ±0. 5° ±100° Plastic Optometry Trial Lens for Ophthalmic Lens Tool Pinhole Glasses

-Function: The light fins are to change the accommodating stimulus, the positive mirror reduces the accommodating stimulus, the negative mirror increases the accommodating stimulus, and the stimulus remains unchanged; - Lens material: The optical fins use high-definition resin lenses, which are clear and transparent, with accurate diopter, bringing you a clear vision and easy to use; - Reversible: the lens test can be by both adults and children.

The optical flip slider snaps on and is reversible for convenience -Plastic material: The optometry flap is made of plastic, which is safe and , sturdy and durable, light in weight, and easy to hold and operate.