The artificial eye

Some worthwhile knowledge and useful informations concerning the artificial eyes and the Ocularist.

some models of artificial eyes

The Ocularist
What is an Ocularist? He is a specialist, that prepares and adapts artificial eyes, which are produced precisely to look like the natural eye. This occurs in a particular and selective procedure (see also "production").
Very often patients are afraid when they visit the Ocularist for the first time. They think, they have to go through a painful treatment again. Often they are only unsure or they don´t know yet, what will happen to them.
We show them what an artificial eye looks like, and explain to them, that the treatment is completely painless. An important point is also to remember, that the most difficult part (If it was an accident, an injury, a malady, a tumor etc. - whatever has led to the loss of the eye) is now past.
We try to give them back their natural look and with it connected the return of their self-confidence.
Self-confidence - psychological strenghthening   to summery
To become blind is already a traumatic experience in itself. Often it occurs that one loses this eye completely. Then these people wear an artificial eye. A natural appearance is reached again by an individual adaptation of the artificial eye for each eye socket (Orbita) for the respective patient. This fact and also the trouble-free wearing of artificial eyes leads to a certain appearance and improved self-esteem again.
Therefore artificial eyes are not only used for the protection of the socket against impurities and irritations but it is a quite important factor to the psychological care of the patients.
If an artificial eye is more or less noticeable, depends mainly (in most cases) on the reason for the loss of the eye (injury, accident, tumor) and the associated operation. If all the ocular muscles still exist, the Ocularist can prepare an artificial eye so that it is not  felt as an "artificial" but much more like the "own" eye and it will not be noticed at all.
Forms
Artificial eyes are roughly subdivided in two categories - into the "double-sided" and into the "single-sided" design.

The "double-sided" is thicker and stronger than the "single-sided". Therefore, it is rather used at larger or deeper eye sockets. If the socket should have become atrophied, an "single-sided" form is prepared with considerable probability. If there is still the existing eyeball without vision or if the Bulb is already shrunk, one carries a very thin prosthesis, a so-called Skleral- or Bulb-shell.

The designs of all prostheses always differ amongst themselves, because each artificial eye is specifically and individually prepared for the eye socket of each patient.
Material selection   to summery
By the selection of material, there are some essential advantages for the special-glass (Kryolith) instead of the acrylic material (PMMA). These advantages have been proven by scientific tests, and for many generations many wearer of prostheses have shown a preference for the special-glass artificial eye (see also "material comparison").

These advantages are:
  • its shine and especially its natural appearance
  • the very smooth, hard and resistant surface with its particular good surface characteristics
  • a surface, that on basis of its manufacture technique is completely freely of elevation
  • the good moistening effect for covering the surface with tears. There is no need for the usage of particular pharmaceutical moisten-liquids
  • a simple and medically perfect cleaning
  • its high wearing comfort
 

 

Implants
When the eyeball is removed, the volume or this space, which was occupied by it, can be filled. So-called implants fill this task. Implant exists in different materials and in different sizes. The doctor that is treating the patient will decide which implant is the best suited for his patient.
The implant serves only as eyeball substitute, that fills the space which was emptied by the removal (Enucleation) of the eyeball. Later, the artificial eye is carried on the implant, similar like a contact-lens on the sighted eye. That the artificial eye moves, is the activity of the ocular and lid muscles.
Mobility of the artificial eye   to summery
From long experience one can say that in accordance with the prerequisites of the socket and the still sufficient existence of the ocular musculature a very good mobility of the artificial eye can be reached.
Start of the treatment
Approximately 2 weeks after the operation, the patient should visit the Ocularist according in agreement with the treating doctor the further procedure is decided between Ocularist and patient.
By no means should the time period be too long because this could lead to a change of the eye socket and the lid border folds. This could have influence on the natural look of the prosthesis.
Difficulties after the removal of an eye   to summery
After the removal of an eye one can only see two-dimensional more. The depth perception is lost. The depth perception is the ability to appraise the size of objects and her distance. With two healty eyes, an object is normally viewed from two negligibly different visual angles. Consequently, one sees three-dimensional.
If there is only one eye left, the second angle is missing and consequently one sees only two-dimensional more. At the beginning this leads to small problem, but after a short period of (getting accustom to the situation) time our brain helps us to make an assessment of distances again. Therfore the three-dimensional viewing can be learned. It is very helpful to move the head or the whole body, a litte back and forwards, in order to see things at different angles. By doing this, one can get a sense of depth perception again.
Surely, a period of time and patience is necessery because in the beginning it can be rather frustrating if one grabs for things, but grabs "beside" it. By such situations, it can be helpful to use some tricks as to touch the end of the glass with the bottle when pouring, for example.

Basically, one can say that the loss of an eye leads to no insurmountable handicap. Patients can (with a short adjustment time) do nearly everything that they had done previously with the use of an artificial eye.

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