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Can you sleep with contact lenses

Can you sleep with contact lenses

4hw.com.cn: now many nearsighted friends will choose to wear contact lenses, but it is troublesome for new friends. They have to wear them repeatedly before going to bed. Can they sleep with contact lenses? Let's take a look at the general knowledge of wearing contact lenses.

contact lenses

Contact lenses, also known as corneal contact lenses, are lenses worn on the cornea of the eye to correct vision or protect the eyes. According to the soft and hard of the material, it includes hard, semi-hard and soft. Contact lenses not only bring great improvement to patients with ametropia such as myopia, hyperopia and astigmatism in terms of appearance and convenience. In addition, it has also played a special role in controlling the development of juvenile myopia and astigmatism and treating special eye diseases.

Can you sleep with contact lenses?

may not. Normal cornea needs' breathing '. When opening eyes, corneal oxygen supply mainly comes from the atmosphere. When closing eyes, it mainly comes from corneoscleral margin and eyelid conjunctival vessels, accounting for only 1 / 3 of the open eyes. Therefore, wearing glasses at this time is easy to cause corneal hypoxia.

Why is the degree of contact lens different from that of frame lens?

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 in myopia is slightly lower than that of frame glasses, while in hyperopia it is the opposite.

Are contact lenses as thin as possible?

Not absolutely. Thin contact lenses increase oxygen permeability and improve comfort, but they are easy to cause lens drying and dehydration, corneal drying and corneal staining, and the lens is easy to be damaged.

Can you swim with contact lenses?

may not. Unless you wear an eye mask, the microorganisms in the pool will pollute the lens and the water will wash away the lens.

Can contact lenses still be used after scars?

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

Johnson & Johnson contact lenses or hazardous particles

More and more girls wear contact lenses for beauty, because they will not be found in the observation room without close observation. But recently, something happened to Johnson & Johnson contact lenses! On September 26, MHRA, the British drug regulatory agency, announced that a specific batch of anxiou daily throwing contact lenses of Johnson & Johnson may contain particles or cause eye damage. Johnson & Johnson is recalling relevant products. There may be particles in the affected batch of contact lenses or their soaking solution, or cause redness, discomfort and corneal abrasion