How does binocular adjustment calculate

1.

The eye is an organ that can sense light. The simplest eye structure can detect the light and shade of the surrounding environment, and the more complex eye structure can provide vision. In many vertebrates and some mollusks, the eyes image by projecting light onto the light sensitive retina, where light is received and converted into signals that pass through the optic nerve to the brain

make the divergent light from the near object bend and image on the retina, then the near object can be seen clearly, which is called regulation. The distant point of emmetropia is more than 5 meters, and the distant point of myopia is less than 5 meters. The formula of D = 1 / F (diopter = 1 meter / focal length) can be used to calculate the distant point of myopia, that is, the distance that myopia can see the target. For example, the distance that 4.00d myopia can see the target is 0.25 meters

extended data

in the process of eye adjustment, abnormal adjustment occasionally occurs, the main reasons are as follows:

1, insufficient adjustment, accompanied by exophora, mostly caused by long-time close work

2. Hyperadjustment was more common in children. When looking at close objects, the regulatory response was greater than the regulatory stimulus

However, the response was slow when the distance and distance were alternately fixed

2. Eye accommodation has nothing to do with the far point, but has something to do with the near point.
the eye rotation method can restore vision by enhancing the accommodation of the lens.

the premise of treating myopia is that the diopter is less than 600 degrees,
the eye accommodation is strong, the axis and refractive system are normal, non amblyopia, non hereditary, and the funs is healthy...
the younger the eligible person is, the better<

true myopia "irreversible", "incurable" and "mirror only theory" have graally become popular, and become a great legacy after the conclusion

my case, Hope to help you

always remember that the door to recovery of pseudomyopia is wide open
as long as you dare to break through
even the door of true myopia is open
as long as you are not "irreversible" by
true myopia "Can't be cured" and "only mirror theory"
this sentence scared
dare to push it away

my example:
My myopia was true myopia in primary school. It had risen to 250 degrees in the second grade of Junior high school. At that time, I also wore glasses in the middle of the second row
I started to turn my eyes 100-150 times a day in the second grade of junior high school

, and it recovered to an estimated 100 degrees in the third grade of junior high school last year, So I can see without glasses in the fourth row in class,

I grow very fast,
now I sit in the last row,
but I can still see clearly without glasses,

note: you must use force to turn your eyes,
in addition, use circle, triangle and figure-8 to turn each other,
and keep turning forward and backward
the speed of recovery will be greatly improved
of course, you can also turn your eyes before or when remembering something, because turning your eyes can also improve memory
if you turn your eyes first and then wear presbyopic glasses or progressive multifocal glasses (never wear glasses properly, It's better to do homework and read
the recovery effect is better
the newly recovered vision will not rebound easily

reference: blink of an eye method

choose a quiet place, or sit or stand or lie down, relax the whole body, clear the distractions, open your eyes, keep your head and neck still, and turn your eyes alone
first gaze directly below, then turn slowly to the left, then turn directly above the gaze, to the right, and finally return to directly below the gaze.
in this way, turn clockwise for 9 turns. Then, turn your eyes from the bottom to the right, to the top, to the left, and then back to the bottom,

in this way, turn 6 circles counterclockwise. Four times in all. Every time you turn, your eyeball should reach its limit as much as possible
this eye blinking method can exercise eye muscles, improve nutrition, and make eyes flexible and bright

can true myopia recover
A: it can be recovered. According to the nature of myopia, index myopia and curvature myopia can't be recovered, and non plastic axial myopia can't be recovered. In true myopia, the optic axis is lengthened, some can be shortened, some can't be shortened, and in some true myopia, the optic axis is not lengthened, but the visual function is defective. Therefore, to see the nature of true myopia, every myopic can not give up the opportunity to recover from myopia, especially for minor children, the younger the age, the greater the possibility of eyeball rejuvenation, and the greater the hope of restoring the original normal vision. Practice has proved that more than 90% of children with myopia can recover their normal vision through 1 + 1 service of myopia recovery glasses.

3. Do more eye relaxing exercises and eye exercises, and see more green plants

4. When the eye looks at 50cm, it needs to adjust 2D. Myopia - 2.00d, if not wearing glasses, the total adjustment is 0, if wearing glasses, the total adjustment is 2D

5. When an object moves from 6 meters away to 6 meters away, the light entering the eye changes from parallel to divergent. After refraction, the object image must be behind the retina, and the vision will become blurred. But in fact, as the object moves closer, a series of activities occur in the eye, so that the object can still image on the retina, which is called eye regulation. The adjustment of the eye is mainly realized by increasing the refractive power by convex lens

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6. The poor eye adjustment is because you spend too much time looking at things at close range. It is suggested that we often go out for a walk and look at the distance to relax the muscles of both eyes, which can restore the adjustment ability of eyes.

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