Study of the field of view and resolution of the retina
The field of view is the room surrounding us as we look straight ahead, without our eyes moving. Once we decide the field of view's size and external limits, we transfer the stimulus from behind the child's room, and observe once he sees movement on the field of view periphery.
In studying small children, the focus between the main and peripheral stimuli is always difficult to manage. The baby may be so interested in the person before him that contextual knowledge would go unnoticed. Often keeping the child in a stroller in front of a mirror for some time is better, and watching his actions by shifting toys from behind.
The patient puts on a brace for his head, looks at the oval screen and sees a series of flashes. Flashes may be of varying colors, and can appear in the field of view at various times. The patient should be pressing the button after seeing the flash and the system will save the result. The system tests every element again to correct the patient's errors.
The visual field test helps you to assess eye sensitivity and peripheral vision area. They mainly assess damage caused by glaucoma to the nerve fibers in the eye, but the test can also be extended to cases with other vision problems. There are a variety of ways to check your viewing area. The consultant will determine the most suitable for you.
What is the field of view?
The field of visuality can be identified as the space where our visual system can detect stimuli. In other words, the field of view is what our eyes can see when we focus our eyes on a static point; that which includes the region where we concentrate the gaze and its surroundings (periphery). We everyday experience the world around us, using the field of view.
Normal boundaries of the field of view:
- Nose: this is the space that is located between the center of the field of vision and the nose. The normal boundary in this part of the field of view is 60 ° (along the horizontal axis).
- Lateral region: we are talking about the space that is located between the center of the field of view and the ear. The normal boundary in this part of the field of view is 100 ° (along the horizontal axis).
- Upper area: the space that goes from the center of the field of view up. The normal boundary in this part of the field of view is 60 ° (along the vertical axis).
- Lower area: the space that goes down from the center of the field of view. The normal boundary in this part of the field of view is 75º (along the vertical axis).
- Reducing the specified boundaries of the field of view entails a decrease in what a person can see by focusing his eyes on one point, as well as difficulties that may arise when moving around.
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