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Over The Last 3 Years Thousands Of Men And Women Have Been Turning To [The Internet|The Web|The Net|The World Wide
Over the last 3 years thousands of individuals have been turning to the net looking for on the web suppliers of prescription glasses. The prices of prescription eye wear on the internet is at an all time low and savings of up to 75% of the regular retail cost isn't unheard of.This guide to assist you to prevent any pitfalls and choose upon a frame and lens which will suit, fit and work, so saving you useful time and income!How you can Choose A FRAME THAT FITSFrame sizes are typically within the format "50 - 20 - 140". In this example this indicates that the lens diameter is 50mm the bridge distance is 20mm and the arm length is 140mm. This can generally be discovered on the inside arm or on the back of the bridge.You are able to use this as a guideline by comparing them to your personal glassesHOWEVER, this is not the top method to acquire a fantastic fitting frame. At spex4less there are two further measurements that are FAR less difficult to understand and make certain a a lot much better result.Every of the frames on the internet site consists of the total frame width in millimeters and total frame depth in millimeters, compare these to your own frames for a great fitting frame.The best way to Select A FRAME THAT SUITSThere are particular face shapes that suit particular lens shapes and a lot of guides to this are floating about the internet. The general guide is listed here:-Oval FacesMore frames look great with this face shape than any other, so long as the size of the frames is in proportion to the face.Oblong FacesLong narrow faces are comparable to square faces in that the chin and cheek are of almost the exact same width. Facial length, even so, is far higher than the width. Frames really should cover as significantly of the centre of the face as possible so that you can minimize the length.Round FacesTo play down the roundness, pick frames with straight or angular lines. Deep colours for example black or tortoise also minimizes fullness.Square FacesCompliment a square face with frames which are slightly curved. The top of the frames should sit high sufficient on the face to downplay the jaw line.Triangular FacesThis shape is defined by a broad forehead and narrow mouth and chin. Frames with a thin rim and vertical lines will aid balance the bottom component of the face. Frames really should not sit too high on the face. Avoid huge frames, heavy nose bridges, bold colours and square shapes.Nonetheless, as a lot of folks know there are often exceptions to any rule!My advice would be to use this guide if you have in no way worn glasses just before. A lot of people who are already wearing glasses know which shapes suit them and which don't.Choose a pair of glasses similar to the ones you might have at the moment, OR, if you are attempting to uncover a new look why not go for a rimless or semi-rimless frame with the very same lens shape as your present glasses, or vice versa.YOUR PRESCRIPTION AND AVOIDING Widespread MISTAKES"*Please pay specific attention here*"Your prescription might appear a little confusing at first glance but it really is quite basic to recognize.Firstly, each and every prescription follows the identical format wherever you might be inside the world. There might be a couple of variations and abbreviations, but I will explain them later.Let's describe what it all means 1st.Each and every prescription will have a left and proper value for the correction of your vision inside the following boxes:"SPH" (sphere). The correction for long or short sightedness."CYL" (cylindrical). The correction for an Astigmatism."AXIS" The axis that the correction for the Astigmatism requirements to be set at.Sometimes an Add or Addition, constantly "+" value is included for us to decipher your reading prescription, but only should you need glasses for both distance and for reading.In some rarer circumstances Prism and Base is utilized for the correction of double vision.On our internet site and most of the other people out there you'll be able to select your prescription from drop down boxes to ensure that you can merely copy the details you've on your written prescription.*VERY Crucial - Don't fall for the most common mistake!*The single most common mistake when entering prescriptions on the web is choosing a " +"value instead of a "-" value or vice versa.Your prescription may well consist of both "+" AND "-" Values. As an example:-SPH (Spherical) will consist of a + or - power (unless 0.00) in 0.25 steps. EG, -0.25, -0.50, -0.75, -1.00, -1.25 and so on..CYL (cylindrical) may consist of a + or - power in 0.25 actions. EG, -0.25, -0.50, -0.75, -1.00, -1.25 and so on..Axis will consist of a numerical value from 0 to 180, BUT, only if you have a CYL value.Note: Normally opticians will write the "-" and "+" signs above the value.ADD / Addition Will only consist of a + value as is it's what it says on the tin, an "addition". We add this value to your distance prescription if you will need reading glasses also as distance or for bifocals.Note: Some opticians will write out your total near prescription underneath your total distance prescription. In this case you may will need to call us to tell you what the "add" is.Frequent ABBREVIATIONSPlano, 0.00, Infinity - All mean the identical thing nothing! Or No correction is needed.DS - "Dioptre Spheres" Normally appears under the CYL box indicating that there is certainly no astigmatism (No CYL value). Nevertheless, this can sometime appear after a reading addition.OD - Means your proper eye.OS - Means your left eye.PD - "Pupillary Distance" will be the distance between the centre of one pupil to the centre of the other in millimeters. I would like to take a moment to talk about your "PD" as this has caused a lot debate in dispensing glasses online.Opticians usually will not give this to you as they will probably figure that you wish to purchase your glasses on the web and not from them. In most circumstances, except for those with especially high prescriptions, we can calculate this usually inside a millimeter utilizing experience and certain order criteria including your gender and the size of frame you've chosen etc.Nevertheless, it can be extremely easy to measure your own "PD". The most effective way is to have a friend help you. Take a look at a point within the distance whilst your friend takes the measurement in millimeters, should you wanted to be super accurate measure the left side of the left pupil to the left side of the correct pupil.Outside UK prescription format = EG: +1.25 (-1.00) x 180° Although it looks different it's the exact same. The very first value will be the SPH, the second in brackets id the CYL, along with the x180° is the Axis in this case 180.The way to Pick The very best LENSLenses come in numerous flavours and again, at first, things can become a bit confusing. But do not worry. I am here to explain them all in detail so that you'll be able to recognize and choose the most effective lens option for you.Firstly lenses can be made in two materials Organic (Plastic) or Mineral (Glass).Most lenses sold today are of the plastic variety as they are far lighter than glass. In some rare occasions when extremely thin lenses are required for really high prescriptions glass can be the top option.Each lens will also have what we call a "Refractive index" The way in which the refractive index is calculated isn't crucial at this time. What is crucial is what it indicates to the thickness of the lens.Most individuals think that when we say a 1.6 lens that this indicates it can be going to be 1.6mm thick, THIS IS WRONG.Basically the higher the number the thinner the lens will be. This is because materials that bend light more than other people have a higher "Refractive index" and hence a shorter or longer focal length. This means that the very same correction and focal length can be achieved from "less" lens (material) making them thinner.Here is a key to choosing the top lens.Standard Plastic CR39 (1.5) We use 1.56 on all standard lenses Ideal for most prescriptions (prescriptions with powers stronger than +3.00 and -3.00 will start to look thick, powers between the two will look fine).Plastic (1.6) An ideal option for prescriptions up to +5.00 and down to -5.00. 1.6 lenses are 23% thinner than standard plastic. Prescription outside this range will start to look thick.Plastic (1.67) Probably probably the most popular of the thinner lens options. 15% thinner than the 1.6 and 25% flatter. Ideal for prescriptions up to +7.00 and down to -7.00 prescription outside this range will look thick.Plastic (1.74) The thinnest plastic lens available on the market. 50% thinner than the 1.5 standard plastic and 30% lighter than the glass equivalent. Great for mid to high prescriptions.Glass (1.7) An ideal budget thin lens for "-" power prescriptions up to - 10.00. Nonetheless, they are going to be heavier than plasticGlass (1.8) Rarely used but very good for high power prescriptions. Expensive option.Glass (1.9) Rarely utilised but excellent for high power prescriptions. Expensive option.Lens TypesThere are also numerous different styles of lenses. Lenses for single vision correction e.g. distance or reading, to Bifocals and Varifocals for the correction of both distance and reading inside 1 pair of glasses.VarifocalsFirstly I would like to talk about Varifocals as there's much debate about whether or not they should be supplied on-line. At Spex4less we do not feel that it's morally correct to supply these on the web just yet, UNLESS it's part of our Re Glaze Service and you might have varifocal lens in your glasses already.Varifocals blend gradually from your distance prescription through your intermediate prescription in to your reading prescription. This indicates that the lens has to be set at exactly the correct height in the frame to start with.The crucial measurement required to align varifocals will be the height in millimeters from the centre of your pupil to the bottom of the new frame, this measurement cannot be taken on the web.Although it really is becoming typical practice on-line to make use of averages and expertise along with other factors like order information to calculate some measurements for example the "PD" we spoke about earlier, it's not yet feasible to do this with Varifocals. Some on the internet companies will still provide varifocals for you and you might get lucky. However I would not advise anyone to do this until technology allows us to take the accurate measurements required.We are currently working on a varifocal system that should allow us to supply Varifocals accurately. I will let you know when the results are in.BifocalsBifocals are basically distance glasses with a reading segment within the bottom. Unlike Varifocals Bifocals are commonly sold on the internet as the height measurement is far less crucial and averages can be employed with great success. Due to the fact that there is certainly no gradual phase from distance into reading and they are just distance with a reading segment Bifocals have a far wider corridor for reading than Varifocals but have no intermediate correction.You'll find also various types or "shapes" of the reading segment.Typically the standard is the "D Seg" this 1 looks like the letter D on its side with the flat part it the top hence the name D Seg.There is also a "round" segment in various sizes and executive or "E Type" bifocal where the whole bottom half of the lens is dedicated to reading (Great for men and women who do a lot of reading at work utilizing plans etc).Bifocals are only available in standard plastic, standard glass and 1.6 plastic.Single Vision"Single Vision" lenses can be utilised for just distance, just intermediate or just reading hence the name "single vision". Nonetheless, numerous people who are short sighted "-" Power SPH prescriptions will be able to read with their distance glasses. Single vision lenses are available in both materials and all indexes.Lens CoatingsTintsTints can be used to make "Plastic" lenses in to sunglass lenses and are available in a lot of colours. Nevertheless, 1.67 and 1.74 lenses cannot be tinted as they already contain an antireflective coating to reduce "Power rings" which I will explain later.PhotochromicPhotochromcs are generally referred to as "Reactolite" which is a brand name for the glass variety or "Transitions" which is a brand name for the plastic variety.Basically they do the identical factor. These are lenses which are clear indoors but then "react" to UV (Sunlight) and "transform" into sunglasses.NOTE: As photocromic lenses call for UV to change, employing them behind a car windscreen won't work as effectively as normal due to the windscreen filtering out some of the UV.Nonetheless, we have found that the glass reactolite works far better than the plastic behind a car windscreen, but not as excellent as the plastic in regular conditions.PolarizedLight reflected from surfaces like a flat road or smooth water is usually horizontally polarized. This horizontally polarized light is blocked by the vertically oriented polarizers inside the lenses filtering our glare and allowing you to see below the water line. Available in grey or brown polarized lenses are ideal for fisherman and also for drivers.Anti ReflectiveUsually an anti reflective coating is referred to as an "MAR" (Multi Anti Reflective Coating). You will find numerous benefits to an MAR. Firstly they are far more aesthetically pleasing as they reduce the amount of light reflecting off your lenses especially when having your photograph taken.Other benefits include:-o Reduced glare when driving at nighto Men and women can see your eyes and not a patch of lighto Filters out radiation from computer screenso Reduces "Power rings" visible rings on the lens in high prescriptions which is caused by light constantly bouncing back and forth within the lens due to total internal reflection.o Provides UV protectiono Anti static aiding lens cleaningSpex4less provides MAR coated glasses for characters in Coronation Street to reduce reflections from studio lights and reflections of camera men in the characters glasses.SUMMARYThe internet is reaching further and further in to our daily lives as more and more products become available on the web.Buying your glasses on-line is surely going to be an exciting and hassle free encounter now that you've taken time to read this guide and you could also save yourself a small fortune.
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