Views:80 Author:Site Editor Publish Time: 2020-04-06 Origin:Site
Eye examination is a complicated and delicate work, involving many medical equipment, vision chart, slit lamp, ophthalmoscope, tonometer, optometry instrument, gonioscope, penlight, etc. Below we mainly introduce the inspection method for adolescent squint.
When you see a teenager coming to the store for treatment, if you see that the child's eyes are deflected, you must first determine whether the oblique position is true strabismus. Because some children, he may have the illusion of esotropia due to the inner skin of the palate or side gaze. A full eye examination is necessary.
Some simple methods, for example, you can pinch the skin of the child's nose bridge slightly, pull his inner condyles, and observe whether the eyes are inclination or just look like inclination. In addition to these methods used daily, some professional inspections are needed to specifically determine whether the child has an oblique position.
Let the pen-type flashlight illuminate the two pupils of the customer at the same time. The first thing to observe is whether the reflection points of the two pupils of the customer are symmetrical.Penlight can be used.
1. Determine if there is strabismus
If the two corneal reflection points are symmetrical or relatively symmetrical, there is no strabismus; if the corneal reflection point of the patient's left eye is significantly asymmetrical to the right, then it is probable that he has strabismus, and the position is obvious, It cannot be judged which eye is the fixation eye, whether it is inclination or exotropy, and the amount of oblique position cannot be judged; We need do the next eye examination.
2. Monocular examination
During the eye examination,without blocking the patient's eyes, take a pen flashlight in front of a single eye and cast a light spot. Determine his Lambda angle (also called kappa angle) by observing the position of this reflection point.
Under normal circumstances, if the customer looks at the light source with one eye, the corneal reflection point should be exactly at the center of his pupil. More commonly, the pupil reflection is a little bit inside the pupil. Because it exists Lambda Corner.
3. Why does the pupil reflection point fall to the nose position?
First, let's understand a few positions. At the forefront of the eye, we call it the front pole of the eyeball, and there is a position at the rear of the eye called the back pole of the eye. Usually we use this point to look at the object, we call it macular fovea. At this time, the foveal fovea does not fall on the posterior pole of the eye, but is located more temporally than the posterior pole.
In most cases, when your visual axis is aligned with the object, it will be reflected in front of your eyes, and the corneal reflection point will fall to this position, which is just inside the pupil center. Some people are a little bit more inward than the pupil reflection point, which is the most common location.
Another method of oblique eye examination is a cover test. How does it work? Follow us in the next article to tell you the answer.