Comprehensive Lens Collection: This set includes 22 trial lenses, each housed in a durable metal frame with a clear design on both sides of the handles. The lenses offer precise diopter measurements and high light transmittance, essential for optometrists and vision testing professionals. Clearly Marked Lens Power: Each lens has its power clearly indicated on the edge as well as on the inner tray, making it easy to identify. The lightweight and compact design makes it perfect for home visits. Durable Metal Frame: Crafted with a metal frame, this trial lens set is ideal for use in MRI facilities or any settings that require non-magnetic tools and equipment. Protective Storage: The included protective box preserves the clarity and transparency of the lenses. Choose between a wooden or aluminum box to keep the lenses safe. Note that lens fogging may occur over time due to chemical glue exposure. Versatile Application: This lens set is highly beneficial for optometrists, vision testers, and for home use to assess refractive errors such as farsightedness, myopia, presbyopia, astigmatism, strabismus, and color blindness.