How to find contact lenses if they fall on the ground?

Contact lenses are a good helper for modern myopic people. They are small in size, easy to carry, and convenient to wear. In fact, there are many people around us who wear contact lenses. Generally speaking, if they don’t say it, you can’t tell. This is enough to prove how convenient and beautiful contact lenses are. But contact lenses also have disadvantages, such as being unable to find them if they fall to the ground. Today I will teach you a method to find contact lenses.

First of all, don't walk around in a panic, and don't stand up immediately. First, look carefully to see if it is on your clothes or thighs, because most of them are in these places. If you don't find it, stand up and look carefully to see if anything has fallen. If not, squat on the ground, take a step back and look at the ground sideways. You can see the difference in light and find the transparent contact lens. Take a step back because the lens usually falls in front. When you step back a long distance, you can easily observe a large area of ​​the ground and it is easier to see the lens in the changes of light.

Q: Can I sleep while wearing contact lenses?

Answer: No. A normal cornea needs to "breathe". When the eyes are open, the oxygen supply to the cornea mainly comes from the atmosphere, and when the eyes are closed, it mainly comes from the cornea's margins and conjunctival blood vessels, which only accounts for 1/3 of that when the eyes are open. Therefore, wearing glasses at this time can easily cause corneal hypoxia.

Q: Why are contact lens prescriptions different from those for glasses?

Answer: Frame glasses are placed in front of the eyes, while contact lenses are directly attached to the front of the cornea. There is no vertex distance effect of frame glasses. At the same time, according to certain optical principles, the degree of contact lenses for myopia is slightly lower than that of frame glasses, and the opposite is true for hyperopia.

Q: Are thinner contact lenses better?

Answer: Not absolutely. Thin contact lenses increase oxygen permeability and improve comfort, but they can easily cause the lenses to dry out and become dehydrated, causing dry and stained corneas, and they can also be easily damaged.

Q: Can I swim while wearing contact lenses?

Answer: No. Unless you wear eye protection, microorganisms in the pool can cause lens contamination and the current can wash away the lenses.

Q: Can I still use my contact lenses after they are scratched?

The depth of small scratches on the lens varies. In severe cases, they will cause irritation to the eyes and damage the corneal surface. It is necessary to ask an ophthalmologist to determine whether the lens should be replaced. Some small shallow scratches on the surface of hard contact lenses can be repaired by grinding, but soft contact lenses cannot be repaired.