Mt boas

These are very tiny items, well made and do the job perfectly. A range of sizes are supplied, so accurate measurement of the drilled lens holes is required. Optical techicians nip off the surplus plastic and compress-fit the sleeve using special tools. Buying those would add at least £50, making make one "low-cost repair" very expensive! Maybe leave it to the optician's lab.....As a dentist, I was able to match the sleeve diameter, trim up with an ordinary scalpel and gently use hobby pliers to make a rapid repair of my specs. Even so, I saw the first transparent sleeve 'disappear' as it popped out of my tweezers! One quick tip - a bit of masking tape across the lens helps to avoid scratches.