Accommodation Volume

The volume of accommodation is the ability of the eye to focus on objects located at different distances from the eyes. This indicator is measured in diopters and depends on age, visual health and other factors.

To measure the volume of accommodation, a special device is used - an accommodation tester. It allows you to determine how much the focal length of the eyes changes when the distance to the object changes.

The volume of accommodation can be low or high, depending on the state of the visual organs. If accommodation is low, then vision becomes blurry when looking at objects at different distances. This can lead to headaches and other vision problems.

To increase the volume of accommodation, you need to regularly do eye exercises, take vitamins and minerals, and also monitor the correct daily routine. In addition, it is important to eat right and not abuse alcohol and tobacco.

In general, the amount of accommodation is an important indicator of the health of the eyes and visual organs in general. Therefore, it is necessary to monitor this indicator and, if necessary, contact an ophthalmologist for consultation and treatment.

The volume of accommodation is an indicator that reflects the change in distance visual acuity with the convergence of the visual axes of the eyeballs at a distance of 33 cm from the object in question. It is measured in diopters, multiples of the so-called conventional unit of accommodation. It is used to assess the functional state of the ciliary body and the degree of endurance of the accommodative system in relation to the far point (in particular, for persons for whom such studies are not provided for during a medical examination, to determine whether they have the ability to see equally well both near and far).

**Accommodation amplitude** is one of the properties of the visual analyzer (oculomotor apparatus), consisting in the ability of the accommodative apparatus of the eye to adapt its optical refractive power to certain vision conditions on which the gaze is fixed. There are maximum and minimum AM. The minimum AM, at which preservation of function is still possible, corresponds to clear vision. At maximum, it is almost impossible to keep the object clearly in the focal space. This value is approximately -4D and, less commonly, -5.5D. The maximum, all other things being equal, the above value can be maintained only for several minutes and, thereby, assess the endurance of the accommodative muscles of the eye - one of the most important factors in the successful training of accommodators. The spread of the maximum amplitude can be very significant and depends on the person’s level of vital activity, physical fitness, age and other factors.

When looking at the far point, the depth of the foveal fossa gradually increases and the convexity of the eyeball decreases, which leads to a gradual decrease in its refractive power. The refractive power of the eyeball due to the work of the ciliary muscle decreases and reaches a minimum or neutral position, at which the cornea works equally with the refractive substance of the sclera. With further visual strain caused by a compensatory shift from the far point to the near one, there is a sharp decrease in convexity and an increase in depth in the equator of the eyeball (the “convex-concave glass” effect), which leads to an increase in refraction and the occurrence of amblyopia. Hypermetropia caused, for example, by significant proximity