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FIELD OF VISION TESTING

When one stares forward with a steady eye, the stationary item is clearly visible. Even without turning our eyes in a different direction, we may notice a lot of things. The field of view refers to the entire observed region.

We distinguish between a one-eyed field of vision (which we perceive with only one eye) and a two-eyed field of view. The fields of view of the two eyes intersect in the centre, in the center. This is how we see space.

The range of vision

Glaucoma damage is indicated by a narrowing of the field of vision. Initial field loss is more common on the edges (periphery), although it can also happen toward the center of the field of view. The patient’s ability to recognize this occurrence is nearly difficult, especially when these processes proceed slowly. 

 

Due to the coincidence of vision in the two eyes, there is a possibility that the loss of vision in one eye will be compensated by the loss of vision in the other, and the patient will not notice the damage.

 

Glaucoma lesions grow undetected until they affect the same region of vision in both eyes. The visual field tester is a crucial tool for detecting vision problems early on and tracking their progression (perimeter).

Computer examination

A patient with glaucoma requires specialist care:

  • Regular examination is essential for medicine to correct intraocular pressure, and computer field of vision inspection is critical. 
  • Internal medical risk factors should be examined in addition to the fundus examination.
  • Cataracts are a slow-moving, chronic illness in which the number of optic nerve fibers decreases.

The destruction of nerve fibers narrows the visual field and causes irreversible eyesight loss. The goal of regular ophthalmic exams in glaucoma patients is to assist them retain eye function. Vision can only be saved if treatment is given in a timely and proper manner. Internal medicine risk factors should be tracked throughout the course of the illness.

What method is used to assess the field of view?

The individual’s visual field is mapped independently in both eyes during the painless visual field assessment. The patient sits in front of a big hemisphere and the investigated eye stares exactly in the middle of the semicircle while utilizing the field of vision (perimeter) equipment. The chin and forehead support keep the head in place. The gaze should be concentrated on the mark at the hemisphere’s center. Small spots of light appear at various locations across the hemisphere, as indicated by the patient activating a switch.

 

With older systems, the physician manipulates the little point of light physically; on newer perimeters, the computer controls the appearance of highlights and records patient response. We can determine the field of vision loss and its magnitude using the perimeter. 

Cataracts are a slow-moving, chronic illness in which the number of optic nerve fibers decreases. The destruction of nerve fibers narrows the visual field and causes irreversible eyesight loss. Patients with glaucoma should have regular ophthalmology examinations to keep their eyes healthy. Vision can only be saved if treatment is given in a timely and proper manner. Internal medicine risk factors should be tracked throughout the course of the illness.

Field of view testing

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