You will see two types of prescription sport sunglasses in our store – those with RX insert lenses and those with direct glazed lenses. We thought it might be helpful for customers if we explain the pros and cons of each type.
The glazing lenses of the rayban 4147 replacement screws are great for meeting the requirements of the people. The selection of the right one is there that is compatible for the face of the people. The pros and cons of the lenses should be available with the people to have the benefits.
Advantages of RX insert eyewear
In this type of eyewear, the tinted lenses are fitted to the front part of the glasses frame and the prescription or “RX” lenses are clipped directly behind them.
Many sport sunglasses in our range have interchangeable tinted polycarbonate lenses for use in different light conditions. With the Rx insert type of prescription eyewear, the tinted lenses are relatively inexpensive to buy or replace, because they are mass produced rather than being a bespoke item. So if you want to use one set of prescription glasses for different applications throughout the year and need several tints, it may be more cost effective to go for the Rx insert type.
If your optical prescription changes, you can obtain a new set of Rx lenses rather than having to replace the entire glasses.
If you wear contact lenses some of the time, you have the option to wear the glasses with the Rx insert removed.
Rx lenses can be made by most optical labs, so you are likely to find that your optician or local lens manufacturer can supply them. This keeps prices competitive.
Rx insert lenses can normally accommodate higher power prescriptions than direct glazed models.
Disadvantages of RX insert eyewear
When you are wearing the sunglasses with lightly tinted or clear lenses, you can see the prescription lenses sitting behind, which some regard as looking a bit geeky.
Normally you have to remove the Rx lenses before changing the tinted ones, which can be a bit fiddly.
Rx insert eyewear is not suitable for water sports, as the water can get in between the two sets of lenses and the Rx adapter may fall out.
Our advice
With Rx insert glasses, the insert lenses may be closer to your eyes than your everyday specs, so you may need to get your optician to give you an adjusted prescription for sports eyewear.
Also, if you are getting Rx lenses made, it’s worth specifiying an anti-mist coating if you plan to use them for energetic sports.
If you are short sighted (your prescription will have negative values for Sphere) then it is advisable to specify an anti-reflect coating on the lenses, or you may see reflections of your face in them when you have the glasses on!
Advantages of direct-glazed eyewear
In this type of eyewear, the tinted lenses are made to your optical prescription and then direct-glazed into the frame.
The main advantage over Rx insert types is probably style and convenience for some uses, such as watersports.
Some wearers find direct-glazed eyewear more comfortable to wear.
Disadvantages of direct-glazed eyewear
Direct-glazed prescription sunglasses tend to be more expensive than Rx insert models, because the lenses are bespoke-made.
Most direct-glazed sunglasses do not have an interchangeable lens option (though this is available with the Dixon TAC-RX).
Because the lenses are larger and the glasses frame is wrapped, direct-glazed models are not suitable for high power prescriptions.
Because the lenses themselves are curved, you may experience some distortion at the periphery.
Many direct-glazed sunglasses do not have anti-fog features built into the frame design such as vented lenses, so frame shape and fit to your face will determine how much they steam up.
Our advice:
With direct-glazed sunglasses, look carefully at the specification of the lenses you are actually getting to determine their suitability for your use. Some direct glazed lenses may appear relatively inexpensive compared with others. This may be because they are made from CR39 plastic rather than shatterproof polycarbonate. This is OK if you are not planning to use the glasses for sports where there is a danger to your eyes from impact. If you are buying glasses to use for extreme or contact sports, you need shatterproof polycarbonate lenses.
Also ask whether the lenses will be hard-coated to reduce fogging.
