Can myopia and presbyopia cancel each other out? Be careful not to see clearly at both near and far!

Myopia and presbyopia

Can they offset each other?

▶Cause

Myopia – Refractive Error

Presbyopia - a physiological phenomenon

"Myopia"

Myopia is a type of refractive error. When the eye is in a relaxed state, parallel light rays enter the eye and focus in front of the retina, resulting in a failure to form a clear image on the retina.

"Presbyopia"

Presbyopia is not hyperopia. Presbyopia is a physiological phenomenon caused by the aging of the eyes .

As we age, the lens hardens, loses elasticity, and has a reduced ability to adjust. The ciliary muscle also has a weaker contraction ability, which causes the focus to fall behind the retina , making it difficult to see close up .

Myopia and presbyopia are two different concepts

The principles of generation are different and cannot cancel each other out.

If you are nearsighted

Myopia and presbyopia coexist

That is

I can't see clearly because the distance is too close.

I can't see clearly from a distance

How to correct myopia and presbyopia?

The method of correcting myopia and presbyopia depends mainly on the severity of the symptoms and specific needs of the individual. The following are some common correction methods:

1. Myopia correction

1. Frame glasses

Patients with moderate and low myopia can correct it by wearing frame glasses.

(Pictures from the Internet)

2. Orthokeratology lenses

Orthokeratology lenses, also known as OK lenses, are a type of specially designed hard contact lenses that feature a flat center and steep periphery in an inverse geometric design. The unique inverse curved surface design changes the corneal curvature and shape during sleep, so that during the day, there is no need for additional optical correction and clear naked eye vision.

(Pictures from the Internet!)

Principle of corneal reshaping - squeezing tear film effect <br /> In the relatively secret gap, the tear film distribution between the cornea and the orthokeratology lens is inconsistent. It is thin in the center and thick in the periphery. In addition, the squeezing of the eyelids generates positive pressure in the center and negative pressure in the periphery. The "push-suction" effect causes corneal reshaping.

Change the corneal morphology, improve naked eye vision, change the peripheral morphology of the cornea, and delay the progression of degree.

(Pictures from the Internet!)

3. Refractive surgery

If the patient is not suitable for wearing corneal contact lenses, a detailed examination is required to determine whether the patient is qualified for refractive surgery correction (all-laser, all-femtosecond, half-femtosecond, crystal-icl, etc.).

2. Presbyopia correction

1. Frame glasses

When choosing reading glasses, you need to go to a professional ophthalmology institution for optometry and fitting. Professionals will choose reading glasses with appropriate degrees according to the specific situation.

(Pictures from the Internet)

2. Surgical correction

It is suitable for people whose presbyopia symptoms are more serious and whose needs cannot be met by wearing glasses.