Tutorials & Tips
Eyeglasses For Your Face Shape
It will be quite easy to select eyeglasses if you are familiar with your face shape. Come here to simply recognize your face shape, and frames we recommended below can be perfect references for you!!
How To Fill Out The Prescription?
Single Vision Prescription
If your prescription is like the following one, you need first to choose single vision type, and then fill in the correct information like the example below.
Single Vision Prescription With Prism
If your single vision prescription is like the following one, you also need to fill in the prism information besides all other information like the example below. (Note: there is no PD value in the prescription, but you need to fill in your PD value) How to measure your PD?
Progressive Prescription
If your prescription is like the following ones, you need to fill in information like the example below. (Note: there is no PD value in the prescription, but you need to fill in your PD value) How to measure your PD?
- Sample 1, you just need to fill in the corresponding values.
- Sample 2, you need to change +225 to +2.25, -150 to -1.50, -125 to -1.25, -50 to -0.50, and then fill in the corresponding values.-
- Sample 3, you need to use Near O.D. +0.75-Distance O.D.-1.50 or use Near O.S.+1.00- Distance O.S. -1.25 to get the ADD +2.25 value and then fill in the ADD blank.
PS: the three different prescriptions get the same prescription lenses.
Reading Prescription
If your prescription is like the following ones, you need to fill in information like the example below. (Note: there is no PD value in the prescription, but you need to fill in your PD value)
Other Information You Might Use When Filling In Prescription
OD stands for “oculus dexter,” or right eye.
OS stands for “oculus sinister,” or left eye.
if there is PL or DS in your prescription, it means the value should be 0.
The term PL (Plano) means there is no spherical correction in this eye.
DS stands for “diopter sphere”, which means there is no astigmatism correction for this eye.
You need to fill in information like the example below. (Note: there isn’t PD in the prescription, but you need fill in your PD measurement)
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.
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.
Step 1
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.
Step 2
Close your right eye and align the 0 mm over the center of your left pupil.
Step 3
Close your left eye and note the reading directly over your right pupil. That will be your Total PD.
Step 4
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.
Our Frame Sizes
Due to the different measurements methods, the measurements printed on the inside of the temple arm may vary from those showing on our website. We suggest you measure your frame dimensions to make sure your new glasses correctly fit your face.
| Size | Frame Width (mm) |
|---|---|
|
Narrow |
128mm |
|
Medium |
129mm-138mm |
|
Wide |
≥139mm |
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
Frame 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
Professional Lens Service
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 Krooway.
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 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.
Progressive Lenses
Our Lenses – KR Resin
Our Frame Sizes
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
Blue-ray exists everywhere today
With the widespread use of electronic screens, more people suffer from eyestrain symptoms when using electronic devices. One of the reasons for this symptom is the blue light emitted from the display on these devices.
Blue-ray will cause diffusion and flickering in the vision
The shorter the wavelength, the more energy light waves, which are more likely to cause eye fatigue. Blue light, which is next to ultraviolet light on the electromagnetic spectrum, has a shorter wavelength than other visible light. Besides, it also tends to be diffused. Therefore, it is considered to be the cause of visual flicker.
Blue light blocking lens can effectively reduce incoming blue light to the eyes
Krooway’s blue light blocking lens adopted AR coating technology. Taking advantage of the principles of AR coating in the opposite way, it can prevent blue light from passing through the lens by increasing the reflection.
Advantages of Krooway’s Blue Light Blocking Lens
- 100% UV protected.
- Better glare reduction and help with efficiency and productivity.
- Enhance contrast and help reduce eye fatigue.
- Increase comfort by reducing blue light transmission
How To Adjust Your Eyeglasses?
Whether you just get your new glasses or have wear them for a long time, the frames may pinch your nose, slide out of place or simply appear crooked. Except taking them to an optometrist for an adjustment, you can do it yourself by following these instructions.
Stand in front of a mirror and look straight ahead, make sure that the middle of the lenses is level with the center of your eyes. Check for the fit and make some adjustments properly.
1. Your glasses are sitting too low on your nose
For Wire Frame Glasses
Use your thumbs to gently push the nose pads closer both sides until they fit comfortably.
For Plastic Frame Glasses
Run the earpieces under warm water (not boiling) for 30-60 seconds. Gently bend the earpieces slightly downwards to add curve.
2. Your glasses are sitting too high on your nose
For Wire Frame Glasses
Use your thumbs to gently push out on the nose pads both sides until they sit snugly on your nose.
For Plastic Frame Glasses
Run the earpieces under warm water (not boiling) for 30-60 seconds. Gently bend the earpieces upwards to relax the curve.
3. Your glasses look crooked or tilted heavily to one side
Lay your eyeglasses upside down on a flat surface to ensure both of the temple arms rest evenly. If not, you should level the temple arms or the earpieces.
For Wire Frame Glasses
Gently bend the arms or earpieces with small pliers or your bare hands.
For Plastic Frame Glasses
Carefully heat the higher arm with a hair dryer to make the plastic pliable. Slowly move the plastic downward with your hands until it is in the desired position.
Eyeglasses For Your Face Shape
It will be quite easy to select eyeglasses if you are familiar with your face shape. Come here to simply recognize your face shape, and frames we recommended below can be perfect references for you!!
How To Fill Out The Prescription?
Single Vision Prescription
If your prescription is like the following one, you need first to choose single vision type, and then fill in the correct information like the example below.
Single Vision Prescription With Prism
If your single vision prescription is like the following one, you also need to fill in the prism information besides all other information like the example below. (Note: there is no PD value in the prescription, but you need to fill in your PD value) How to measure your PD?
Progressive Prescription
If your prescription is like the following ones, you need to fill in information like the example below. (Note: there is no PD value in the prescription, but you need to fill in your PD value) How to measure your PD?
- Sample 1, you just need to fill in the corresponding values.
- Sample 2, you need to change +225 to +2.25, -150 to -1.50, -125 to -1.25, -50 to -0.50, and then fill in the corresponding values.-
- Sample 3, you need to use Near O.D. +0.75-Distance O.D.-1.50 or use Near O.S.+1.00- Distance O.S. -1.25 to get the ADD +2.25 value and then fill in the ADD blank.
PS: the three different prescriptions get the same prescription lenses.
Reading Prescription
If your prescription is like the following ones, you need to fill in information like the example below. (Note: there is no PD value in the prescription, but you need to fill in your PD value)
Other Information You Might Use When Filling In Prescription
OD stands for “oculus dexter,” or right eye.
OS stands for “oculus sinister,” or left eye.
if there is PL or DS in your prescription, it means the value should be 0.
The term PL (Plano) means there is no spherical correction in this eye.
DS stands for “diopter sphere”, which means there is no astigmatism correction for this eye.
You need to fill in information like the example below. (Note: there isn’t PD in the prescription, but you need fill in your PD measurement)
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.
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.
Step 1
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.
Step 2
Close your right eye and align the 0 mm over the center of your left pupil.
Step 3
Close your left eye and note the reading directly over your right pupil. That will be your Total PD.
Step 4
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.
Our Frame Sizes
Due to the different measurements methods, the measurements printed on the inside of the temple arm may vary from those showing on our website. We suggest you measure your frame dimensions to make sure your new glasses correctly fit your face.
| Size | Frame Width (mm) |
|---|---|
|
Narrow |
128mm |
|
Medium |
129mm-138mm |
|
Wide |
≥139mm |
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
Frame 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
Professional Lens Service
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 Krooway.
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 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.
Progressive Lenses
Our Lenses – KR Resin
Our Frame Sizes
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
Blue-ray exists everywhere today
With the widespread use of electronic screens, more people suffer from eyestrain symptoms when using electronic devices. One of the reasons for this symptom is the blue light emitted from the display on these devices.
Blue-ray will cause diffusion and flickering in the vision
The shorter the wavelength, the more energy light waves, which are more likely to cause eye fatigue. Blue light, which is next to ultraviolet light on the electromagnetic spectrum, has a shorter wavelength than other visible light. Besides, it also tends to be diffused. Therefore, it is considered to be the cause of visual flicker.
Blue light blocking lens can effectively reduce incoming blue light to the eyes
Krooway’s blue light blocking lens adopted AR coating technology. Taking advantage of the principles of AR coating in the opposite way, it can prevent blue light from passing through the lens by increasing the reflection.
Advantages of Krooway’s Blue Light Blocking Lens
- 100% UV protected.
- Better glare reduction and help with efficiency and productivity.
- Enhance contrast and help reduce eye fatigue.
- Increase comfort by reducing blue light transmission
How To Adjust Your Eyeglasses?
Whether you just get your new glasses or have wear them for a long time, the frames may pinch your nose, slide out of place or simply appear crooked. Except taking them to an optometrist for an adjustment, you can do it yourself by following these instructions.
Stand in front of a mirror and look straight ahead, make sure that the middle of the lenses is level with the center of your eyes. Check for the fit and make some adjustments properly.
1. Your glasses are sitting too low on your nose
For Wire Frame Glasses
Use your thumbs to gently push the nose pads closer both sides until they fit comfortably.
For Plastic Frame Glasses
Run the earpieces under warm water (not boiling) for 30-60 seconds. Gently bend the earpieces slightly downwards to add curve.
2. Your glasses are sitting too high on your nose
For Wire Frame Glasses
Use your thumbs to gently push out on the nose pads both sides until they sit snugly on your nose.
For Plastic Frame Glasses
Run the earpieces under warm water (not boiling) for 30-60 seconds. Gently bend the earpieces upwards to relax the curve.
3. Your glasses look crooked or tilted heavily to one side
Lay your eyeglasses upside down on a flat surface to ensure both of the temple arms rest evenly. If not, you should level the temple arms or the earpieces.
For Wire Frame Glasses
Gently bend the arms or earpieces with small pliers or your bare hands.
For Plastic Frame Glasses
Carefully heat the higher arm with a hair dryer to make the plastic pliable. Slowly move the plastic downward with your hands until it is in the desired position.
