Are blue light blocking lenses effective？Yes! They are useful, but not a panacea, and it depends on individual eye habits.
Effects of blue light on the eyes:
Blue light is a part of natural visible light, emitted by both sunlight and electronic screens. Prolonged and intense exposure to blue light can potentially cause some harm to the eyes, such as dryness and visual fatigue.
However, not all blue light is harmful. Long-wavelength blue light can be beneficial to the human body, while short-wavelength blue light may cause harm to the eyes only under prolonged,uninterrupted, and intense exposure.
The function of blue block lenses:
Blue block lenses protect the eyes by reflecting or absorbing harmful short-wavelength blue light through a coating on the lens surface or by incorporating blue block factors into the lens material.
Suitable for certain groups:
For those who use electronic devices for long periods each day (more than four hours), people with dry eyes, or those who have undergone cataract surgery, blue block lenses may offer some protection. However, for individuals with normal eye use, especially teenagers, wearing blue block lenses for extended periods may affect visual acuity and color perception development, and could even accelerate the progression of myopia.
Other considerations:
The light transmittance of blue block lenses may be lower, which can lead to visual fatigue when worn.
Some blue block lenses have a yellowish tint to the lenses, which may affect color judgment and are therefore not suitable for professions that require high color recognition, such as design and graphic arts.
In summary:
Whether blue block lenses are necessary depends on individual eye habits and needs. For those who use electronic devices for long periods or have specific eye conditions, blue block lenses may offer some protection. However, for individuals with normal eye use, especially teenagers, wearing blue light blocking glasses for extended periods may not be appropriate. Additionally, it is important to consider the impact of the lenses' light transmittance and color on vision.
Post time: Jan-10-2025