Optical Shop

What makes perfect glasses?  Its five measurements  (IDEALLY 7):

1.  The Pupillary Distance.  In our opinion, this can only be measured electronically and in millimeters. Eyeglasses require monocular Pds. There are different PDs for distance, intermediate, and near. It changes as you age. As a child, the distance between your eyes is shorter than when you're older. 
2. Optical Center. This is the distance from the bottom of the frame to the center of your pupil. This vertical measurement must superimpose the distance between your eyes known as the P.D. so, in essence, is 2 measurements (One Horizontal and one Vertical). This measurement must be done by having the subject wear actual frames. The location of the optical center of the lens allows the lens to be positioned in an area of the least distortion in the lens.
3. Vertex Distance. The distance from your eye to the back surface of your lens. Ideally, it should be exactly the same as the one when your eyes refraction was done. It requires the frame you are getting. This is a must measurement in high prescriptions. Different frames different measurements. If you move your glasses forward this is the vertex distance. Try it you'll see the difference.
4.  Pantoscopic Tilt Measurement. This measurement is often overlooked but perfect eyeglasses require it. The lens has to be tilted exactly to the location of the least distortion.  A lens that is tilted forward produces a different optical effect than a lens tilted backward.
5. Wrap Angle Measurement. If the frame you have is somewhat curved or extremely curved, your eyeglass power will change and induce a distortion.  If it is extremely curved not only does it requires a lens properly made to that curve (Base Curve) but a power compensation done with a computerized program.  Wrap lenses can only be done digitally.
6. Verification of Eyewear. All Eyeglasses have to be verified when they arrive from a US laboratory. Foreign labs do not have to conform to US standards. Our state-licensed opticians will verify that the prescription is exactly what your physician has ordered. If there are any problems they will troubleshoot the problem and provide a solution. 
7. All Eyewear has to be serviced after the sale. Adjustments and position of wear alignments are standard in all Licensed Optical Establishments. Remember Online eyeglasses sellers are not licensed optical establishments and do not comply with Florida standards such as staffing Florida Licensed Opticians who have training and expertise when things do not go as planned. They (online sellers) are usually in faraway countries with no OSHA regulations and eyewear verification is usually nonexistent. Don't be lured into substandard care, always seek licensed eyecare professionals.