Recently, the author encountered a particularly representative case. During a vision examination, the child's vision was very good when both eyes were tested. However, when testing each eye individually, it was discovered that one eye had myopia of -2.00D, which was over...
Vision includes many aspects, such as visual acuity, color vision, stereoscopic vision, and form vision. Currently, various defocused lenses are mainly used for myopia correction in children and adolescents, requiring accurate refraction. In this issue, we will briefly i...
Nowadays, more and more young people feel that wearing oversized frame glasses can make their faces appear smaller, which is trendy and fashionable. However, they may not be aware that oversized frame glasses are often one of the reasons for deteriorating vision and stra...
Definition of Defocus Signal
"Defocus" is an important visual feedback signal that can change the growth pattern of the developing eyeball. If defocus stimulation is given by wearing lenses during eye development, the eye will develop towards the position of the defocus ...
I’ve always been a fan of Gunnar eyewear. I was introduced to them through the Game Grumps YouTube channel in 2016 and ended up buying a pair for work since I sit in front of a computer most days. However, I didn’t wear contact lenses at the time and ende...
Night vision goggles are becoming increasingly popular due to their benefits, especially for people with night blindness. Finding a suitable match among hundreds of seemingly suitable options can be difficult. So, if you’re looking for a new pair of night visio...
Most things have a period of use or shelf life, and so do glasses. In fact, compared to other things, glasses are more of a consumable item.
A survey found that most people use glasses with resin lenses. Among them, 35.9% of people change their glasses approximately eve...
The Concept of Stress
When discussing the concept of stress, we inevitably have to involve strain. Stress refers to the force generated within an object to resist deformation under external forces. Strain, on the other hand, refers to the rel...
The classification of the three major materials
Glass lenses
In the early days, the main material for lenses was optical glass. This was mainly because optical glass lenses have high light transmittance, good clarity, and relatively mature and simple manufacturing proces...
When the weather is hot, more and more people choose to wear sunglasses to protect their eyes. Mainstream sunglasses are divided into tinted and polarized. Whether it is consumers or businesses, polarized sunglasses are not unfamiliar.
Definition Of Polarization
Polariza...
Lenses are familiar to many people, and they play a major role in correcting myopia in glasses. Lenses have different coating layers, such as green coating, blue coating, blue-purple coating, and even luxury gold coating. The wear and tear of the coating layers is one of...
The optometry is not equal to the mirror prescription
Many people believe that optometry is simply "testing the degree of nearsightedness" and that once they have obtained this result, they can proceed with eyeglass fitting. However, an optometry prescription is only a "...