How To Choose Eyeglasses
How to Measure Your Pupillary Distance(PD)?
How to Measure Your Pupillary Distance(PD)?
What Is
Pupillary Distance(PD)?Pupillary Distance (PD) is the distance, in millimeters, between the center of one pupil to the center of the other. The PD is needed to manufacture your eyeglasses because it determines the exact optical center of the lens, which is the point where you look through the lens.
Printable PD ruler
Print this page on A4 (without scaling, at 100%. ) Use PD ruler at the bottom of the page. Recommend to use a physical PD ruler or consult your ophthalmologist.
Steps to measure your PD
Note: The average PD is between 54 and 78mm. Might be a bit different compared to practical measurements. Please measure your PD 2-3 times to ensure you get the accurate results.
Step1
Position yourself arm’s length from your friend or yourself approximately 8 inches (20cm) away from a mirror. Please measure your PD 2-3 times to ensure you get accurate results.
Step2
Close your right eye and align the 0 mm over the center of your left pupil.
Step3
Close your left eye and note the reading directly over your right pupil. That will be your Total PD.
Step4
You also need to measure the distance from two pupils to the center of your nose respectively to make sure that if you have two PDs (OD & OS).
How To Measure Your Frame Size
Choosing the right size is the key to ensuring you’re getting the right fit. If you want to find a suitable size, you can check the size of your current frame, or measure your current frame yourself.
Frame Width
Frame Width is the measurement horizontally across the back of the frame.height requirements for single vision prescriptions.
Lens Width
Lens Width is the horizontal width of each lens at its widest point
Lens Height
Lens Height is the vertical distance of the lens at its tallest point. If you want to order progressive, the lens height of the frame should be at least 33mm.
Bridge Width
Bridge Width is the shortest distance (in millime-ters) between your two lenses.
Temple Length
Temple Length is the length of the temple to its temple tip, including the bend that sits on your ear.
Lenses And Coatings
We offer quality prescription lenses to any customer who buys frames from us. Our quality service is reassuring and we offer breath-taking
value compared to optical stores. Each pair of prescription glasses will be made fitted with 100% accuracy and quality. It is easy and
comfortable to buy prescription eyewear from KENYAN GOGGLES.
Single Vision Lenses
Single vision lenses are standard prescriptions for glasses. The glasses have only one viewing area on the entire lens, and the correction area can be used for long distances, medium distances, or reading. For long-distance, if you wear glasses all day but don’t have dual/zoom glasses, or need them most of the time to see things far away. For middle distance, if you primarily need this pair of glasses to work on a computer or something else at arm’s length or if you are a musician you need this pair of glasses to read music. For reading, if you need to read things around you, such as files, documents, etc.
Progressive Lenses
Progressive lenses provide a smooth transition from the distance through intermediate to near, with all the in-between corrections included as well. You can look up to see anything in the distance, look ahead to view your computer in the intermediate zone and drop your gaze downward to read, and do fine work comfortably in the close zone. That is to say, progressive lenses are the closest to how natural vision is that you can get in a pair of prescription eyeglasses.
Our Lenses – KR Resin
Impact Resistant
KR resin material has high surface finish, and its products have good flexibility. The coating film can be coated with one layer or multiple layers. The coating material is usually magnesium fluoride (MgF2), and its refractive index is 1.38. This film has considerable hardness. Compared with the linear molecular structure of ordinary lenses, KR super-tough material has a network-shaped cross-linked molecular structure with strong impact resistance.
Improved Clarity
KR resin lens uses the mechanism of destructive interference to reduce the reflected light, and the visible light transmittance is greatly improved, generally reaching 98%. KR super-tough resin lenses have an Abbe number as high as 43, which is a medium-low dispersion material. These lenses minimize the colored edges when viewing objects, resulting in clearer views and the wider vision fields.
- ANTI-SCRATCH
Lenses with anti-scratch coating are much harder and more resistant to scratching, and therefore have greater durability.
- UV PROTECTION
UV protection coating has an invisible dye that blocks the ultraviolet (UV) rays and thus preventing them from harming your eyes.
- ANTI-REFLECTIVE
This coating eliminates reflection so the lenses appear less visible. Also it minimizes glare caused by reflection and provides better vision when working on a computer or driving in bright sunlight.
Blue Light Blocking Lens
Greater reading comfort
HEV light waves are one of the shortest, yet, highest energy wavelengths, and they tend to flicker a lot more than longer, weaker waves. This means that they create a glare that reduces visual contrast. Blue-violet light lenses filter out some of these waves, giving you better visual comfort and enhanced clarity.
Equipped with a special coating
Our blue light lenses come with a HMAR/UV coating, which is a hard multilayer coating with strong anti-reflection properties to reduce glare. It also offers UV protection and filters out blue-violet light, improving visual comfort for the wearer. Blue light lenses also have scratch-resistant properties.
When to use blue-violet light glasses
At work
For those who work mainly using computer screens, digital protection glasses are a must for maximum comfort. Keep a pair at your desk so those long hours don’t go unprotected.
At home
As you relax at home, your eyes are still working overtime. Protect them while browsing online or watching TV to benefit your optical health.
On the go
Even when you are out and about, you will still need to use your phone at some point, whether it’s for texting, social media or directions. Blue light lenses add extra comfort.
Kenyan Goggles Ltd
17th Floor, JKUAT Towers, Kenyatta Ave, Nairobi. Kenya.
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