F.I.T. (Facial Integration Tailoring)
By Glenn Courtney, A.B.O.C.
of Vision Centre Optical
Vision Centre and Shademakers Eyewear is proud of our customer satisfaction rate; part of this is due to our experience and ability to adjust the eyewear we dispense. F.I.T. or Facial Integration Tailoring is how we describe the process we go through when adjusting your eyewear. Our opticians are trained in this process and we are confident it is one of the reasons our clients are very satisfied with our services. F.I.T. has 21 points within the process which I will describe here.
Pre measurement adjustments are critical to accurate measurements. “Nose pads” should rest comfortably along the side of the nose and help maintain height (1) and distance (2) from the eye. These pads require adjustments for distance between them so the frame stays at the right height on the bridge of the nose. They also require an angle adjustment both vertically (3) and horizontally (4) so they sit flat and comfortably on the side of the nose as to not cause irritation of the skin.
“Leveling” (5) the top rim allows accurate vertical heights for optic centers (OC-progressive or free form) and segment height (bi-focal or tri-focal) measurements as well as a straight appearance. “Base curves” (6) of previously worn lenses are determined prior to ordering new lenses. Clients can be sensitive to this measurement and checking early can avoid refits later.
“Eye size” determines overall size of lens and right (7) and left (8) together create overall width when added to DBL (9) or distance between lenses. These must be considered for overall fit as well as what prescriptions may or may not be appropriate for various lens sizes.
Once the lenses are mounted various adjustments are needed for a successful F.I.T.
“Temple length” adjustments, right (10) and left (11) must be adjusted independently as well; the length from the front of the frame to the turn down location is critical to the frame actually staying up and comfortable both to the ear and bridge of the nose. Temples turned down too soon can cause the eyewear to push forward or down your nose. Turned down too far back creates pressure points where the actual end hits the back of the ear or the side of the head. Both temples (12 & 13) should run parallel along the side of the head equally so pressure is applied evenly and overall length is noted so correct lengths can be ordered if necessary as part of the pre measurement adjustment (14).
“Hinge adjustments” on either side control a number of adjustments; pantoscopic tilt (15) provides the angle the eyes look through the corrective lenses. This adjustment is very important for presbyopes (progressive wears) maximizing viewing areas. Hinge area is also the location used to align the frame vertically so it is straight across the brow line as mentioned earlier. Rarely do we see someone whose ears are the same height on both sides; this has to be corrected by raising or lowering the frame by adjusting the hinge angles.
“Facial shape” (16) is another adjustment that is important in maximizing someone’s corrected vision. Facial shape involves the wrap or curvature of the eyewear, differing degrees of this can improve vision. This wrap can involve a steeper or a flatter curve and is totally a personal preference often caused by previous eyewear, its length of wear and power involved. Clients usually respond immediately to this adjustment and it is often overlooked but an easy fix in many cases.
“Vertex distance” (17) and its adjustment usually require a metal frame with nose pads that can be moved in or out to reach the desired distance. Ophthalmologists and Optometrists, in higher plus lenses, write the refracted vertex distance on the prescription. Clients whose prescriptions are a high plus will benefit by having the back lens surface placed at the correct distance from their cornea. The lens and its corrective power are maximized by having the back of the lens surface positioned the refracted distance to the cornea. This distance is critical when lenses reach powers beyond say a plus 5∆ lens or greater. Movement of this lens can increase power by moving in and decrease by moving the lens away from the eye. This adjustment can improve vision although sometimes slightly it is still an improvement and should be considered as part of the dispensing process.
Sculpting of the temple along the back of the ear is an important area in many ways. The temple end should be turned down past the top of the ear (18) and should run along the back of the ear where it meets the side of the head. Close to the ear; not on the back of the ear and not too far away which will allow movement forward. Temple end adjustment on the temporal bone which runs behind the ear towards the jaw is often an area of sensitivity. The temple ends sculpted along this area varies person to person. Opticians have to learn this skill and visually look at the area to properly adjust the pressure as it runs down behind the ear (19).
Xing adjustments usually pertain to three piece mounts or totally rimless frames and the lens placement after mounting. These lenses are mounted on the frame individually and can end up on different plains. The adjustment is observed usually from the bottom making sure the lenses are both on the same contour and/or angles. The adjustment usually can be made at the bridge but may require re-mounting the individual lens or both. One lens farther away or angled differently can cause issues particularly with progressive lens wearers (20).
“Prescription analysis” (21) is when the eyewear carries the prescription as perceived by the optician. Opticians can serve their clients well by perceiving the end result through visualization of someone’s prescription long before final frame selection is made. Guiding a client through selection of a frame that is visually appealing, fits well, works well with the individual’s prescription are all important. The twenty other adjustments can only happen when this objective is satisfied so overall satisfaction is just a few tweaks away.
For more information or an appointment call 302-645-1800 in Rehoboth, 302-934-6620 in Millsboro and 302-678-3200 in Dover.