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.

Contact us today!

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).



34 million motorists travel the highways of the United Kingdom (1). People are spending an increasing amount of time on the road, with Britons spending an average of 10 hours a week driving, compared to just 3.7 hours walking, 2.7 hours showering, and 4.6 hours socialising with friends and family (2).

Driving is one of many everyday tasks that necessitate continuous, direct vision. Whether you only drive to and from work or you often travel to several destinations, being able to see the road and other drivers is critical for your and others’ safety.

It is not only necessary for your protection to have good vision when driving; it is also a legal necessity. According to Highway Code Rule 92, “you must be able to read a vehicle number plate from a distance of 20 meters in good daylight.” If you are unable to do so, you will face a hefty fine as well as points on your license. Police officers may ask you to take an eye test, and roadside eye tests are now being used in many parts of the UK. Daily eye exams are necessary to thoroughly assess your vision and decide if you need corrective lenses.

Similarly, Highway Code Rule 237 specifies that ‘if you really are dazzled with direct sunshine, slow it down and, if possible, stop.’ This means you’ll probably need a set of lenses when driving, either correction lenses or lenses to protect your eyes from the bright sun. With all that in mind, here are some of the best driving lenses to consider.


Varifocal lenses are intended to correct presbyopia, a condition in which the wearer needs some visual assistance in seeing close, far, and intermediate distances. Clear vision in all three vision zones is essential for driving safely and comfortably on the lane. Even if you’re just driving down the street, it’s important to wear your varifocal lenses.

Varilux Street Pilot is a varifocal lens designed specifically to improve visual comfort while driving. Varilux Road Pilot was designed to have wider fields of vision and to be optimised for your driving vision needs in order to maximise your visual ability.

One of the most difficult aspects of driving vision is at night, when light conditions are low and reflections are more common. Your lenses can help to reduce reflections and glare with Crizal Drive, making it easier to drive at night.


With summer quickly approaching, you may want to consider driving with sun protection lenses. You’re bound to spend a lot of time on the road if you’re going to the coast for a vacation, enjoying the sunny days visiting friends and relatives, or just driving to and from work.

Polarised lenses are specifically designed to remove the bright and unnecessary reflections that occur while driving on sunny days. You’ve also seen bright reflections from the road and other vehicles as you drive, which can be very distracting. Driving with polarised lenses will improve your visual comfort and make you a better driver.

Xperio Polarised lenses have better colour vision than tinted lenses, making it easier to see in bright light, and have the highest degree of UV safety in the Top Specs category. This is important for maintaining safe eyes and vision.


When sunlight is present, Transitions XTRActive lenses automatically adjust to changing light conditions, changing from transparent to tinted. The majority of photochromic lenses respond to Uv rays, however, Transitions XTRActive lenses often react for visible light. As a result, these are the first lenses of their own kind that darken behind

Alternatively, you can call us at 01296 484 222 and one of our customer service representatives will gladly assist you. Contact us today!