-. Binding : Health and Beauty -. Brand : FocusSpecs -. Color : Black -. Feature : FocusSpecs' adjustable focus glasses mean you only need one pair of reading glasses. / Independently adjustable lenses allow you to switch quickly from book to computer, or any other situation you need to see close by. / Glasses work for spherical errors ranging between +0.5 and +4.5. Glasses do NOT work for astigmatism or outside of the given range / Suitable for headwidths of about 4 - 6 inches (100 - 160 mm). These glasses are also one size fits all - and are not meant to be an ideal fit for each person's head. / Give them a try for no risk! If they don't work for you, we gladly offer free returns. -. Label : FocusSpecs -. Manufacturer : FocusSpecs -. MPN : FS-X-001 -. PackageQuantity : 1 -. PartNumber : FS-X-001 -. ProductGroup : Health and Beauty -. ProductTypeName : HEALTH_PERSONAL_CARE -. Publisher : FocusSpecs -. Studio : FocusSpecs -. Title : FocusSpecs v2.0 - Adjustable Reading Glasses (+0.5 - +4.5)