What Are Photochromic Lenses?
Photochromic lenses are just like normal lenses but they automatically become dark when we move in the sunlight. Ultraviolet rays coming from the sun affect the molecules present in the photochromic lenses therefore, these lenses change their colors. These lenses get darker in bright lights and vice-versa.
Therefore, provide the best vision in all lighting conditions. Transition is the best and very well-known brand of photochromic lenses therefore, these lenses are also known as “transition lenses”. The other names also which have been given to these lenses are:
- Adaptive lens
- Auto tinted lens
- Variable tint lens
Photochromic lenses and polarized lenses i.e. sunglasses are very different from each other as the sunglasses have a set tint that protects our eyes from glares but they are not changeable whereas the transition lenses easily adapt to the nature of the light present around and change accordingly.
Characteristics of photochromic lenses
What color lenses should I buy?
Generally, transition lenses are primarily produced in two main shades: smoke gray and brown, as they are considered the best choices for lenses. Other colors like red and yellow are usually only used in the medical field to treat visual issues in patients.
Currently, with advancements in manufacturing technology, lens manufacturers are introducing a variety of transition lenses to the market. These range from conventional materials like glass, CR39, to lenses with high refractive index (Hi-index), or premium materials like Polycarbonate, Polarized…
Among them:
- Gray-black lenses are suitable for individuals engaging in outdoor activities. The black/gray color helps soothe the eyes and improve color differentiation.
- Green lenses effectively reduce glare. If you love water sports, this color is recommended.
- Pink/red lenses are suitable for people living in snowy areas or those involved in activities like mountain climbing, racing, etc.
- Yellow lenses work well in low-light environments and are suitable for activities like racing, playing tennis, etc.
- Blue/purple lenses reduce glare and enhance color differentiation. Blue lenses are suitable for golf enthusiasts.
Transition Speed
When choosing transition lenses, pay attention to the speed at which the lenses transition. If you frequently move between indoor and outdoor settings, opt for lenses that transition quickly to ensure clear vision.
Advantages of Photochromic Lenses
- Helps in reducing eye strain and eye damage by blocking up to 100% harmful UVA/ UVB light.
- Convenient to carry as you do not need different glasses for different lighting conditions.
- Protect our eyes from the high risk of cataracts by blocking out as much light as possible.
- Photochromic lenses are cost-effective. It has the features of both the lenses (normal lens and sunglasses).
- Available in different shades, tints, and styles suitable for your taste.
Disadvantages of Photochromic Lenses
- Photochromic lenses get darker when coming in contact with the sunlight, blocking your windshields. Therefore, they are risky to wear while driving.
- These lenses are also affected by the weather. This means that it takes more time to get dark in the winters.
- Some photochromic lenses are not polarized, leading to harsh glares of sunlight. Therefore, make sure you ask the doctor about all the details of the glasses that you wear.
How Do Photochromic Lenses Work?
Regular sunglasses block out only a particular amount of wavelengths of light with polarization. But the these lenses are carbon-based therefore, the molecules present in the lenses react to the UV, this leads to the change in shape as the lenses absorb the light and it seems to look darker. The darkness of the lens depends on the amount of light present, the brighter the light the darker the lenses. The darkening of the lens takes up to 30 seconds and it can take 2-5 minutes to get back to normal when an individual goes back to an indoor area.
As photochromic lenses protect our eyes from harmful UV rays, therefore, they are considered a safe option to keep our eyes healthy. These lenses are either made up of plastic, glass, or polycarbonate. Different kinds of lenses are prescribed to different people depending on the difficulties faced by them.
Who Should Use Photochromic Lenses?
Photochromic lenses can be worn throughout the day on a daily basis. They can be used just like normal eyeglasses. These lenses are beneficial to all and especially to those who continuously change from outdoors to indoors.
These lenses are highly recommended for children as they tend to spend much time playing outdoors, therefore it keeps their eyes safe from the sunlight.
How To Choose Photochromic Lenses?
Consult an eye care professional as he/she will guide and tell you all about the glasses which are prescribed to you. They will also help you to find the best eyeglasses that will work according to the requirement of your eyes. Consulting them might take some of your time from your busy schedule but it will surely lead to you being happier with the outcome.
These lenses are also known as “transitional lenses” as they adapt themselves depending on the lighting conditions. It gets darker when exposed to bright light, protecting our eyes from harmful UV rays. There are certain benefits of using photochromic lenses over normal sunglasses as it adapts itself depending on the light conditions and you don’t need to carry multiple lenses with you. It has the property of both the normal lenses as well as the polarized lenses. But everything has its limits. These lenses are not safe to wear while driving as they block the windshields. These lenses are also affected by the weather which is again not a very good sign for eyeglasses.
Make sure you consult a doctor before choosing any lenses for yourself. As they will guide you about what is better for your eyes.
Classification of photochromic lenses
Based on Material
- Photochromic Lenses: Made from materials containing transition compounds capable of reacting to UV light to change color.
- Polarized Photochromic Lenses: Combines the glare-reducing feature of polarized lenses with the color-changing ability of transition lenses, providing better protection and glare reduction.
Brands of Photochromic Lenses
- Transitions Lenses: One of the most popular brands offering various types of photochromic lenses, from fast transitions to gradual ones. Transition lenses are often integrated into major eyewear brands.
- Zeiss PhotoFusion Lenses: Zeiss is a leading company in lens manufacturing, and PhotoFusion is their advanced line of transition lenses, adapting well to different light environments.
- Hoya Sensity Lenses: Hoya is also a major brand providing various transition lenses with Sensity technology, offering flexible options for users.
- Essilor Crizal Transition Lenses: Essilor Transition lenses use Chromea 7™ technology, providing a popular and excellent user experience in the market. Essilor Transition lenses have bold colors, quick transition speeds, and complete transparency indoors, offering comprehensive UV protection for the eyes.
- Chemi U2 Lenses: In the mid-range segment, Chemi (from South Korea) offers quality Photochromic lenses. Chemi Lens is a professional eyewear manufacturer brand from South Korea, well-established in the Vietnamese market, with affirmed quality. Chemi’s products are affordable and suitable for many consumers.
Price of Photochromic Lenses
In general, the price of transition lenses can range from average to higher compared to regular lenses, depending on various factors. For accurate pricing information and suitable options, discussing with an eye care professional or reputable eyewear stores is the best approach. The price of transition lenses can vary due to factors like:
- Lens Type: Different lens types with various features and technologies will have different prices. For instance, standard photochromic lenses might be cheaper than those with advanced anti-glare or high UV protection features.
- Brand: Different brands come with varying price points. Well-known and established brands often have higher prices compared to newer or lesser-known brands.
- Lens Structure: Opting for additional features like scratch resistance, water resistance, or premium anti-glare features can increase the price.
- Customization and Additional Accessories: If you request customized options or add accessories like dust-resistant coatings, anti-glare coatings, the price of lenses can increase.
- Eye Prescription: Tailoring lenses to specific eye prescriptions or visual issues may also add to the cost.
Where to Get Photochromic Lenses Cut?
If you’re looking to purchase genuine transition lenses at the best prices, contacting Top Vision Eyewear for advice from international optometrists is recommended. These professionals can help you select transition lenses suitable for your eye condition.
