{"id":27526,"date":"2024-05-21T23:56:34","date_gmt":"2024-05-21T21:56:34","guid":{"rendered":"https:\/\/eyelaser.at\/all-about-the-accommodation-of-the-eye\/"},"modified":"2024-10-02T20:44:03","modified_gmt":"2024-10-02T18:44:03","slug":"all-about-the-accommodation-of-the-eye","status":"publish","type":"post","link":"https:\/\/eyelaser.at\/en\/all-about-the-accommodation-of-the-eye\/","title":{"rendered":"All about the accommodation of the eye"},"content":{"rendered":"\n

Every day, the eye makes use of the ability to accommodate, which is also known as the “autofocus function” of the human eye<\/strong>.\nIn this article, you can find out exactly what accommodation is, how the process works and everything else about the ability to accommodate. <\/p>\n\n

What is accommodation of the eye?<\/h2>\n\n

Accommodation allows the eye to change the total refractive power (refraction) of the crystalline lens by curving the lens in<\/strong> such a way that objects at different distances<\/strong> can be perceived sharply. <\/p>\n\n

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Why is accommodation important? <\/h2>\n\n\n\n

Importance of accommodation for vision<\/h3>\n\n\n\n

Accommodation ensures that a functional near and far adjustment of the eye is possible within just one second<\/strong>.\nPeople do not usually notice this process in everyday life.\nHowever, the eye is constantly accommodating.\nThis function makes it possible to see clearly at both near and far distances. <\/p>\n\n\n\n

The process of accommodation in the eye<\/h3>\n\n\n\n

The lens of the eye can be curved due to its flexibility.\nThis is done by a ring-shaped muscle<\/strong> that is located behind the iris and is fixed by zonular fibers: The ciliary muscle.<\/strong> The ciliary muscle surrounds the lens of the eye.\nWhen the muscle contracts, the lens is pulled together in a spherical shape.\nThis increases the refractive power of the eye.\nThis is important for sharp vision at close range – known as near accommodation. <\/strong> <\/p>\n\n\n\n

With distance vision, less refractive power is required for sharp vision.\nThis is because the rays of light fall almost parallel into the eye when objects are far away.\nThe ciliary muscle does not need to be strained.\nThe lens of the eye becomes flat again and therefore larger – distant objects are then clearly visible.\nThis process is known as distance accommodation<\/strong>. <\/p>\n<\/div>\n\n\n\n

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What is the accommodation width?<\/h3>\n\n

The range between the maximum flat and maximum spherical lens is called the accommodation width.\nYoung people with healthy eyes have an accommodation width of 15 diopters <\/strong>. A deviation of three diopters already noticeably restricts vision. <\/p>\n\n

Role of the eye lens system<\/h3>\n\n

The accommodation of the eyes is so important because the lens of the eye focuses the light.\nClear vision is only possible if the radius of curvature of the crystalline lens is adjusted so that the light rays are projected onto the retina in a focused manner.\nIf the light rays do not fall on the retina, vision is blurred.\nDepending on the distance of the targeted object, the eye lens must always be readjusted. <\/p>\n\n

Consequences and causes of impaired accommodation<\/h2>\n\n

Possible effects of impaired accommodation<\/h3>\n\n

If the process of accommodation is disturbed, there are disturbances when switching from near to far vision.<\/strong> It is also possible that vision is only impaired at certain distances.<\/p>\n\n

Diseases or conditions that can affect accommodation<\/h3>\n\n

A disorder of accommodation can be caused by diseases.\nThese include, in particular, spasm and paralysis<\/strong>. The spasm can extend to the ciliary muscle.\nThis involves a permanent tensing of the ciliary muscle, known as spasm. Accommodation spasm. <\/strong>Patients then report eye pain and blurred distance vision.\nThis can be caused by the following: <\/p>\n\n