PD Self Test - Measure your pupillary distance by yourself

PD Self Test - Measure your pupillary distance by your sel

What is a Pupillary Distance Test? Also known as the PD test, it can be done by self testing yourself. It is a free process of calculating your pupil’s accurate and exact distance from each of your eyes. The process is vital for eye examinations to measure your exact eye’s distance, aiding in the fabrication of men’s/women’s/kid’s eye glasses frame so that your lens will fit correctly in seeing. This method is very useful when it comes to producing eye glasses. The online way to test your Pupillary Distance is available these days and you can even undergo the patent free try on. You can just comfortably go online and upload a full facing picture of yourself or you can use your web camera to take a snap and after which, you can easily grab the results by following the step-by-step instructions on your screen. If you have already bought eye glasses prescribed for you on the internet, you have most probably encountered this term, PD or pupil distance.

You can never undergo eye examinations without undergoing this test first. It is a standard operating procedure when it comes to eye examinations. Although you will not see the result on the prescription copy that you will receive, your result will most probably be noted and recorded. It is very important to go through this quick test. You will experience blurredness in your vision if your prescription eye glasses’ lenses are not lined up accurately with your pupils. This will result to nausea and severe headache. If you will obtain a PD measurement result that you think is not accurate, you can just go through the swift test online again as much as you want to. It is also recommended if you are going to purchase prescription eye glasses that contain a very large amount of wrap.

The corporate with try-on system of the self test allows the patient to see how they look in various frames. This scheme includes AR or anti-reflective treatment, lenses with high index, tints, photochromics and contact lens colors. It lets you see what you look like with the economic prescription eye glasses or sunglasses you are choosing. Occasionally, your information is included in selecting your lens and if you have certain conditions and eye problems. If you are a busy person and you are always on-the-go, this virtual scheme can save a lot of your time. Even when you are in the comfort of your home, you can undergo this eye exam. You can access it anytime you want. You will be very happy if your prescription eye glass purchased online will have an accurate measurement.

If you will look on the internet for economic prescription eye glasses or sunglasses prescribed for you, you may hear other people telling you to take your own pupillary distance self test by looking in the mirror and marking each of your pupils or many other ways, but you may not get an accurate result by doing that. It is highly suggested that you take the quick and convenient hassle-free self test online.

CR-39 began the change of optical lenses from glass to plastic materials. It is lighter weight, more impact resistant than glass lenses; thus, becoming a popular type of material used in single vision, bifocal, and multifocal or progressive lenses.

Material is low price and easy to manufacture. It is often preferred by individuals on a tight budget. However, because of its 1.50 index, customers with high prescription powers are recommended to use higher index lenses such as 1.56, PC, 1.67, or 1.74 lenses.

CR39 Lenses Features are:

Fragmentation: When plastic lens breaks, it breaks into larger fragments than their glass counterparts. Furthermore, the fragmented pieces are not as sharp as glass.
Fogging: CR39 lenses are less likely to fog-up than glass lenses because it responds more favorably to temperature changes.
Weight: Glass lenses are approximately 2X heavier than plastic lenses of similar size and shape. The lighter weight provides the wearer greater comfort.
Reflections: CR39 lenses have much lower internal reflection and surface glare than glass materials.
Tinting: CR39 lenses are great for tinting. Lenses can be tinted to virtually any color. Even lenses with variable thickness are able to be tinted evenly.

If you want thinner, lighter lenses, and have an milder prescription, then mid index lenses are the way to go. As prescription increases, the lenses become thicker. Thicker lenses increase internal reflections that reduce vision quality. Furthermore, thicker lenses add to the weight of each pair of glasses reducing comfort. Mid-Index lenses refract the light at a greater angle allowing the wearer to have a beautifully thin and light pair of glasses.

Mid Index Lenses Features are:

Fragmentation: When plastic lens breaks, it breaks into larger fragments than their glass counterparts. Furthermore, the fragmented pieces are not as sharp as glass.
Fogging: Mid Index lenses are less likely to fog-up than glass lenses because it responds more favorably to temperature changes.
Weight: Glass lenses are approximately 2X heavier than plastic lenses of similar size and shape. The lighter weight provides the wearer greater comfort.
Reflections: Mid Index lenses have much lower internal reflection and surface glare than glass materials.
Tinting: Mid index lenses are also tintable, so you can get that pair of sunglasses you’ve been eyeing for so long.

Polycarbonate lenses has a high index of refraction 1.59 and low density making PC lenses 20% thinner and 25% lighter than regular plastic lenses. Polycarbonate lenses are the most impact resistant lenses on the market. Therefore, it is the industry standard for safety goggles, and highly recommended for kids' lenses.

Polycarbonate Lenses Features are:

Impact Resistant: Polycarbonate material was originally made for uses on canopies covering fighter planes and then made its way into space on astronaut visors and space shuttle windshields. Today it is readily available to the public. It impact resistance makes the material extremely suitable for sports, industrial safety goggles, and children's eyewear.
Scratching: The reason for polycarbonate lenses' impact resistance is because of its "softness". Softer materials will flex instead of fragment when met with great force. However, the property allows lenses to be scratched easily. Therefore, every single one of our polycarbonate lenses is multi-coated with hard coating that forms a protective layer around the lenses allowing the lenses to be free from scratches while retaining its impact resistant qualities.
UV Protection: Polycarbonate lenses inherently carries UV protection properties that blocks nearly 100% of the UV rays from entering the back of the retina.

If you want thinner, lighter lenses, then high index lenses are the way to go. As prescription increases, the lenses become thicker. Thicker lenses increase internal reflections that reduce vision quality. Furthermore, thicker lenses add to the weight of each pair of glasses reducing comfort. Hi-Index lenses refract the light at a greater angle allowing the wearer to have a beautifully thin and light pair of glasses.

High Index Lenses Features are:

Fragmentation: When plastic lens breaks, it breaks into larger fragments than their glass counterparts. Furthermore, the fragmented pieces are not as sharp as glass.
Fogging: High Index lenses are less likely to fog-up than glass lenses because it responds more favorably to temperature changes.
Weight: Glass lenses are approximately 2X heavier than plastic lenses of similar size and shape. The lighter weight provides the wearer greater comfort.
Reflections: High Index lenses have much lower internal reflection and surface glare than glass materials.
Tinting: High index lenses are also tintable, so you can get that pair of sunglasses you've been eyeing for so long.

PD Self Test - Measure your pupillary distance by your sel

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