The Use of Blue Light

The Use of Blue Light

Questions about ‘blue light’ from our patients are becoming more common, in part thanks to recent products promising to limit as well as reduce damaging blue light, and in part due to increased use of screens and light sources, which means we are exposed to more blue light than in the past when we were not all attached to our digital devices and lightbulbs were typically tungsten yellow. So, do these ‘blue blocking’ products really need to be purchased?

To begin, what exactly is blue light?

Many wavelengths of visible color are present in both natural and artificial light. Blue light is at the far end of the spectrum, ranging from 400 to 525nm.

Is blue light harmful to the eyes?

Throughout animal studies, researchers discovered a link between blue light as well as visible light as well as retinal damage. However, researches on humans could only estimate blue light damage because eyes are exposed to light across the spectrum in the normal course of daily life.

Is blue light becoming a bigger problem?

Our lighting habits are changing dramatically: in the last decade, we’ve seen an increase in the use of LED (light-emitting diode) as well as fluorescent lighting, and also light source LEDs in backlit displays of tablets, smartphones, and computers. These light sources emit significantly more blue light than traditional incandescent light bulbs. Regardless, they emit thousands of times less blue light than natural daylight. Despite the fact that these devices are well within international safety limits, research has shown that prolonged exposure to visible blue light can cause eye strain and fatigue. It may also exacerbate sleep disorders.

Are blue light filtering lenses good for your health?

Although there may be clinical situations in which a blue light filtering IOL is recommended to prevent as well as slow the progression of age-related macular degeneration, there is currently insufficient evidence to support this.

Is there any evidence to support the use of blue light filters on spectacle lenses?

Blue light filters may reduce eye fatigue, improve sleep, or preserve macular function in some cases, but because there is limited scientific evidence, we cannot guarantee beneficial results. Patients with these issues, on the other hand, may request these lenses to see if they help them, and they will, of course, be able to see just as clearly with these lenses as with unfiltered lenses.

Top Specs uses which Blue Light Filtering Products?

BlueControl from Hoya is a coating designed to reduce eye strain caused by excessive exposure to blue light emitted by digital devices. It is suitable for most spectacle lenses, including single vision, varifocal, and bifocals. BlueControl absorbs blue light while also being scratch resistant, water, grease, and dirt repellent. To improve your vision, the coating also provides increased contrast, clarity, and color perception.

If you have any questions, please contact us and one of our dispensing opticians will be happy to assist you.

Eye Health Recommendations for Home Workers

Eye Health Recommendations for Home Workers

Many of our patients have continued to work from home following the relaxation of the Covid-19 lockdown, and in nearly every case, working from home has resulted in an increase in time spent in front of a computer screen. Increased screen time can result in a variety of problems ranging from weary eyes to neck or back pain, but there are a few relatively basic steps you can take to alleviate these symptoms.

•To begin, ensure that you have the most up-to-date glasses for screen use. The best glasses for screen viewing for people over the age of 40 are purpose-built for this purpose and are referred to as office lenses, improved readers, or intelligent readers. These aren’t really varifocals (which have a narrow viewing area for screens), but lenses are engineered to provide a large clear area for screen use, reducing tiredness and promoting excellent posture for a healthy back and neck. While these lenses provide the greatest depth of focus, fixed focus computer glasses is an alternative.

• Even minor medicines can have a significant impact. This is because staring at a screen is a visually demanding activity. As a result, you may have a low prescription that aids with prolonged screen use but is not used for anything else. Correcting a minor prescription using computer glasses might help alleviate eye strain and headaches.

• Align your screen properly. Your screen should be slightly below, not above, your eye line. This is because your eyes naturally turn in and down little as you stare at the screen distance. If you are required to gaze up at any part of your screen, this can result in eye strain as your eyes must compensate for the natural small downward bend. Your screen’s top edge should be no higher than eye level.

• If your monitor is older than two years, the contrast and clarity will deteriorate, making viewing less comfortable. If you intend to continue working from home, it is very necessary to invest in a high-quality monitor.

•Some people find it beneficial to reduce blue light from their screens by wearing glasses with a blue-blocking coating. Our optometrists can advise you on how this can help with eye strain reduction.

• The background should not be too bright — avoid placing your screen directly in front of a window. It will create glare, brightness, and distraction, which will cause your eyes too weary. A plain wall behind your screen is preferable, but an aside window is acceptable.

•You may have heard of the 20/20/20/20 rule already. Regular pauses are critical — every 20 minutes, take a 20-second break, look 20 feet away, and blink 20 times to relax the eye muscles. This is critical because when you gaze at a screen, your blink rate decreases considerably, affecting the delicate tear film that protects the surface of your eyes. Once the tear film’s chemistry is altered, a cascade of problems can ensue, ranging from dry and wet eyes to eyelid cysts. Keep a bottle of high-quality, preservative-free fake tears on your desk and add a drop every few hours to keep your eyes feeling fresh.

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The Eyes and General Health

The Eyes and General Health

We are currently in the grip of a novel coronavirus/Covid-19 pandemic, and you may have read that it can cause ocular problems in some cases. This is true for many general health issues, including diabetes, which we explored in depth. You might be interested in learning about some other frequent health issues that may involve the eyes, in addition to Covid- 19:

• Covid-19/Coronavirus: This virus can cause viral conjunctivitis, which is characterized by red, irritated, and watery eyes. This is only one sign of Covid-19, and it would not be enough to diagnose it unless you also have a persistent cough, fever, or other respiratory symptoms. According to recent research, just one out of every hundred people infected by Covid-19 will get viral conjunctivitis. Bacterial conjunctivitis is typically treated with simple lubricating drops and therefore should heal up in a few weeks.

• Common Cold: As mentioned earlier, it can cause viral conjunctivitis. Viral conjunctivitis is highly contagious, and precautions should be taken to avoid spreading it.

• Anaemia (low iron): This can cause tiny blood vessels in the eye to break. These can be observed in the mirror on the white of the eye or by an optometrist when they inspect the back of the eye. These normally resolve on their own and do not require treatment.

• High blood pressure: Can cause difficulties with the fragile blood vessels inside the eyes and, in severe situations, can potentially impair the optic nerve. High blood pressure that is effectively controlled with medication does not normally impair eyesight. High blood pressure can occasionally cause little blood vessels on the white of the eye to burst, but they normally do not require treatment.

• Arthritis: This condition, which is linked to dry eyes and other tear film difficulties, can cause the eyes to appear red and/or feel itchy, gritty, sore, dry, light-sensitive, hazy, burning, or even wet. Please click here for additional information about painful, dry, or watery eyes.

• Eczema and other skin problems: Because the surface of the eye is a continuation of the skin surface, numerous skin disorders, including dry eyes and blepharitis, can cause eyelid skin and ocular surface difficulties. (inflammation/infection of the lash roots/edges of the eyelids)

• Asthma: People with asthma and eczema are more prone to allergens that might harm the eyes. If symptoms are severe, anti-allergy drops may be required.

• Strokes: Strokes can impair the eyes if they occur in areas of the brain where visual circuits are involved. As a result of a stroke, a region of vision in one or both eyes may be lost. This sometimes improves with time, and there is no specific medical treatment available other than that provided by the hospital or GP. In some circumstances, vision training or visual aids can be beneficial.

• High Cholesterol: This can result in a harmless pale ring visible across the outer edge of the iris (colored part of the eye). High cholesterol levels can develop blockages in the blood vessels of the eyes, causing blood flow to be disrupted, and these are occasionally detected during an eye examination.

• Cold sores: Because they might migrate to the eye, contact lenses must be avoided if you’ve any active cold sore blisters in your lips. If you suspect you have cold sores in your eyes, you should seek immediate medical attention.

If you have any questions concerning your eyes or your health, please contact us (or email us if your inquiry is during the current Covid lockdown).

Why Cyclists Should Wear Sunglasses?

Not also long ago, it was feasible to complete in biking without sunglasses as well as win races such as the Scenic tour de France.

No! Along with safeguarding eyes from dust, dirt as well as a shopping list of projectiles, sunglasses are the most effective method to guarantee that they will not struggle with cataracts, keratitis and also various other eye disorders brought on by UV radiation.

Research studies have revealed that the threat of cataracts, a progressive clouding of the lens of the eye that can result in an overall loss of sight, is tripled by lasting direct exposure to the sunlight’s UV (ultraviolet) rays. Shielding the eyes with specialized sunglasses that obstruct one hundred per cent of the sunlight’s UV radiation is the very best means to avoid cataracts.

Direct exposure of the vulnerable eye to UV rays can additionally cause keratitis, a momentary loss of vision combined with a burning experience that arises from swelling of the cornea. An additional solar hazard the sunlight’s warmth, can dry the eyes, create eye tiredness as well as possibly increase the adverse impacts of UV direct exposure.

The danger of eye damages from the sunlight is straight about size and also the strength of direct exposure. Nobody recognizes what the crucial quantity of direct exposure is, yet impacts are advancing; brief, however constant durations invested outside can amount to problem.


Incredibly, the majority of bikers do not think of a set of Biking Sunglasses to be a part of their “set” till a fly strikes them on a rapid flight down a curved respectable, in UK website traffic!

The factor being, biking glasses are not merely an accessory to make you look fantastic on your bike (although they certainly do!). They are an essential biking device, securing a vital part of your body. They block the eyes from intense sunlight light as well as serve as an obstacle throughout wet as well as gusty problems. Among one of the most crucial features is to maintain dirt as well as various other fragments out of the eyes.

Biking glasses give two significant features.

  1. They safeguard your eyes from any particles, dirt, wind and also insects.
  2. They improve your presence of the roadway.

As a perk, Sunglasses are additionally excellent to conceal your rips of discomfort throughout those 15% slopes or those weekend break suffer-fest trips.

Picking biking sunglass can be a tough job. This overview will certainly assist you to deep dive better as well as help you select biking sunglasses.

Lens Shade: For the very best defence, you’ll intend to shut out 75 to 90 per cent of noticeable light in intense sunlight, 35 to half on straight days.

When purchasing a set, seek a tag suggesting their light-absorption high qualities, or the contrary, their transmission element. Several brand names of glasses enable of transforming out of lenses to permit ecological problems.

The very best shade to pick for well-rounded usage is neutral grey since it does not misshape shade, though brownish is OK, as well. Keep away from stylish colours as well as intense shades. They are not sunglasses.

Photochromic lenses, which dim as the light rises, will undoubtedly cover the widest variety of problems and also are offered in numerous thickness varieties.

Ultraviolet Radiation (UV): Mostly, all top quality sunglasses generated today provide crucial defence versus ultraviolet (UVA and also UVB) radiation. Some lens products have an integrated capacity to soak up U/V light, yet the majority of security included the kind of lens finishes.

The majority of U/V from sunlight to planet soaked up by top and ozone layers of the environment and also is diffused better by the time it gets to water level.

U/V degrees that must issue skiers run into at greater altitudes where the ambience is slim and extreme light mirrored off the snow. U/V radiation enhances about 15 per cent for every single 3,000 feet in elevation.

Shields or Wraparound Frames: Wraparound-type frameworks and also lenses supply several benefits for bicyclists. Wraparounds enable the very best outer (side) vision, thanks to the absence of blockage by the structure and even holy place. Field of vision is specifically crucial for navigating safety and security in a group of bikers as well as in website traffic.

Wraparounds additionally maintain drying out wind off the eyes, while enabling adequate airflow to stop fogging of the lenses. Wraparound lenses that expand greater over the brow permit unhampered vision when riding short on the declines.

Lens Kind: Polycarbonate lenses are nearly tangible. They’re additionally lighter and also will certainly not mist up as quickly as glass. Yet plastic lenses are a lot more prone to scrapes and also aren’t always optically-sound. To look for distortion, hold a set of sunglasses at arm’s size and also check them out at a resource of light. Pictures must be clear via every part of the lenses.


Like bike structures, lenses are a vital element of the sunglasses as well as it’s tough to find the distinction in between a beautiful set as well as a not-so-great set of lenses. Advertising and marketing of sunglasses firms as well as composed names for lens products make it also harder to detect the distinction.

Frames: Amongst frameworks, nylon or plastic is lighter, more secure, and also much more long-lasting than steel, however either can come to be breakable in winter. With any framework, try to find joints that are basic and too difficult. Some bikers choose a one-piece framework.

Admit it. There are just two factors you use sunglasses: to shield your eyes and also to look trendy. You have readily available to you both security as well as design crafted right into sport-shield sunglasses for biking. Currently you can have useful as well as classy glasses while riding your bike and also resemble the celebrities of the area.


 If you usually use powered glasses or get in touches with, there are a couple of extra points to consider.

If you usually put on call lenses, vast lenses and also a wraparound design will certainly aid maintain grit out of the eye and even far from the lens. The benefit of calls is that you can switch your sunglasses if the problems alter and also still can see.

If you choose to put on glasses instead of calls, you might ask your lens for inserts which rest inside your sunglasses. A few of the much better well-known brand names can produce prescription Sunglasses which is one of the most hassle-free choice!