Ordinary glasses are designed to correct refractive errors such as myopia, hyperopia, and astigmatism, which can cause blurry vision, eye strain, and headaches. They may have a clear or tinted lens and are made with different materials and coatings, depending on the wearer's needs and preferences.
Anti-blue light glasses, on the other hand, are designed to block blue light emitted by electronic devices such as smartphones, computer screens, and televisions. Blue light has a short wavelength and high energy, which can cause eye strain, and headaches, and disrupt the sleep-wake cycle. Anti-blue light glasses have a special coating that filters out blue light, helping to reduce eye strain and improve sleep quality.
While ordinary glasses can also help to reduce eye strain and headaches, they do not specifically target blue light. Anti-blue light glasses, on the other hand, are designed to provide targeted protection against blue light exposure.
It's important to note that not all blue light is harmful, and some amount of exposure is necessary for regulating the sleep-wake cycle and other important bodily functions. However, excessive blue light exposure, particularly at night, can be disruptive and potentially harmful to eye health.
In summary, ordinary glasses are designed to correct refractive errors, while anti-blue light glasses are designed to block blue light emitted by electronic devices to reduce eye strain and improve sleep quality.