- Structure - The type of the prescription and the lens material play a major role in terms of the overall structure of the frame, especially semi-rimless and rimless frames. For example, installing thinner lenses on rimless are more likely to fracture, unless you use certain materials. And screws on rimless frames may loosen easily, which can cause vision disruption for astigmatism wearers because the optic axes of the lenses change. On the other hand, overly thick lenses are also not recommended with half or rimless frames due to aesthetic factor. For people who have stronger prescription on one and minor prescription on the other eye, when choosing rimless frames, it will visually emphasize the difference in lens thickness. As for far sighted vision, the lenses are more curved, which causes the temples to close in when finished. For this kind of lenses, rimless frames installed on the back of the lenses are recommended.
- Frame Size - In order to select the right-sized frames, there are few things we should consider: face shape and size, pupil distance, viewing area and the lens edge thickness. Ideally the geometric center of the frame shape should be as close to the center of the pupil as possible to avoid decentration. But in some cases pupil height in the frames (aka seg height or OC height) are required more. For example, bifocal and progressive lenses should have more seg height to ensure enough viewing area for the near vision. Under some circumstances, (such as drivers) wearer may need a larger frame for broader viewing range. Therefore, wider rims and bigger frames are usually recommended. However, the sizes of the frames are proportional to the mass of the lenses. So for patients with higher prescription, we would suggest smaller frames to reduce the pressure on the nose caused by the weight of the glasses. Another way to decrease such pressure is to choose the frames with larger nose pads, which can evenly distribute the weight on the nose. As for kids, we should consider low price range, high durability and flexibility as well as safety, because they grow fast and are usually careless with glasses.
- Nosepads (Bridge) - The main function of the nose pads is to support the weight of glasses on the nose. Ideally it would distribute the weight on both sides of the nose evenly. There are no standard guidelines for nose pads. However, we must consider the size of the nose, length of the eyelashes, and the space between the forehead and eyes. It would be unpleasant to have eyelashes touching the lenses or cheeks touching the bottom of the frames when smiling. For bifocal or progressive lenses, it is important to pick frames with adjustable nose-pads in order to fine tune the fitting for individuals.
- Frame selection for progressive lenses - It is very important to match progressive lenses with suitable frames. The followings must be considered: (1) The seg height of the frame must be able to accommodate the design of the progressive lenses. (2) The reading area of the frames should adequate. For example, aviator styles tend to be narrower towards the inner corner, hence, it is not recommended for progressive lenses. (3) The adjustable nosepads are preferred, where after adjustments, the distnace between the eye and lenses should be about 12mm in order to achieve the best visual field. (4) To maximize the reading area, adjust the lenses to tilt foward about 12 degrees. (5) To avoid poor visual resolution, the selected frame should be made of durable materials and resistant to distortion.
- Frame selection for high-prescriptions - For people who have high prescriptions, it is important to consider the frame shpae, size and structure. Eg. (1) A bolder frame should be chosen to minimize the lens thickness showing on the sides. (2) Smaller frames can minimize the lens mass. (3) Find a frame that the wearer's pupil is closer to the middle, which could also minimize the thickness and weight. (4) Nosepads with bigger size and silicone material would help reduce the pressure on the nose and prevent glasses from slipping due to the weight of the glasses. (5) The position of the nosepads should remain some distance apart from the rims to ensure that the thick lenses can be assembled without affecting the fitting. (6) Select sturdier and more durable frames to support the heaviness of the glasses.
Monday, December 6, 2010
Wednesday, November 17, 2010
Frame Selection Tips (1) - "pretty" factor
Nowadays, people don't just wear the glasses for vision corrections and/or protections. Many people wear them as accessories to enhance their look. Thus, when picking out a frame, we not only have to consider if the frame is suitable for wearer's prescription lenses (aka the "comfort" factor) but also the "pretty" factor. We are going to discuss the details of these two factors:
"PRETTY" FACTOR
Everybody wants to look good. Period. From the beauty aspect, picking out a suitable frame, we have to consider a few things: the wearer's sexuality, age, profession, the wardrobe (Style) and the most importantly - the face shape. The height of the face can be divided into thirds - from the top of the forehead to the eyebrows, from the eyebrows to the bottom of the nose, and then from there to the bottom of the chin. If the eyebrows are just at 1/3 of the face, we would call it a "balanced" model. Therefore, based on the position of the eyebrows, we can define three models of a face: Long, Short and Balanced. People with balance face model would fit into most of the frame styles; Wearing darker frames would be better for long models in order to visually "lower" the eyebrow line; and on the contrary, wearing lighter colour or rimless frames would be ideal for short models in order to "lift" the eyebrow line. Esthetically, if the frame bridge line is higher, it could visually make the wearer's nose look longer and vice versa. The same to the frame temples (frame arms), choosing wider and lower position temple frames would make the long shape look shorter, and a narrower and higher position temple frames would make the short shape look longer.
Everybody's face is different, if we really have to define the differences of the shapes, we can find them in seven types: Round, Oval, Square, Rectangle, Diamond, Triangle and Pyramid shapes. Here we have some frame selection tips for each shaped face:
1. Round Face
Consider wider A box (horizontal size) and shorter B box (vertical size) frames in order to make the face look longer. Try to avoid overly round and striaght lined frames.
2. Oval Face
There are less limitations for oval shaped faces when choosing frames. Consider wider A box (horizontal size) and average B box (vertical size) frames but try to avoid straight lined and angled corner frames.
3. Square Face
Consider oval or round style frames, especially the bottom half is rounder, in order to minimize the facial angles. Or consider the semi-rimless frames, which would enhance the effect on making the face shape longer visually.
4. Rectangle Face
Consider rounder edge square frames. Deeper B box (vertical size) would be a bonus. Darker frames would also have the effect on making the face length shorter.
5. Dianmond Face
Consider bigger and wider upper half frames.
6.Triangle Face
Consider small square and rounded frames. Lower half of the frame is flatter and wider would be better.
7. Pyramid Face
Quite opposite of Triangle face, wider upper half and narrower lower half frames would be ideal, eg. cat eye style.
to be continued with part II - "Comfort" factor
Wednesday, June 16, 2010
New Window Displays at FC
Wednesday, June 9, 2010
Tag Heuer
Made with the highest quality materials, you will find that Tag Heuer frames are made with titanium and stainless steel. These frames provide comfort but are still fashion forward. Most of the Tag Heuer frames have very flexible temples to mould perfectly around your face.
Orgeen Frames
Wednesday, June 2, 2010
Summer is just around the corner!
J.F. Rey Frames
We recently blogged about J.F. Rey frames that we had just recieved. Now here are some great photos of those frames.