Visual rehabilitation training guidance refers to a series of planned and orderly training to match the visual skills and visual needs of patients, so as to achieve the purpose of effective, comfortable and lasting eye use.

Introduction To Binocular Vision Training Equipment

At present, there are quite a lot of instruments used for non binocular abnormal vision training at home and abroad, especially in North America. Although these manufacturers provide training methods and steps when patients buy instruments, how to select appropriate instruments for patients and how to determine the best training method is a common problem.

Generally, binocular vision rehabilitation training equipment is divided into two categories: instrument training and free space training. Due to the limitation of instruments, it is difficult to see the trained person's eyes, so sometimes this kind of training is unnatural. A typical example is solid mirror training. Free space training equipment makes the trainees in an environment more similar to natural vision. It is generally believed that the more similar the training environment is to the real visual environment, the better the training effect.

Diaphragms and cracks

Partitions are used to separate what each eye sees in real space, so each eye can see part of the visual target. A fissure is a window opening that separates what is seen by both eyes so that each eye can see part of the visual target. Such devices can be used in patients with mild to moderate inhibition, or in combination with a variety of visual markers. However, for child patients, such training is also difficult to maintain their interest.

Stereoscope

The basic principle of stereoscopic mirror design is to divide the physical space into two independent visual spaces, and each eye can see one of them. It can be realized with a partition (Wheatstone stereoscope) or two independent lens barrels (Brewster stereoscope). In addition, stereoscope can be used in combination with optical lens. Generally, patients with esotropia can successfully train without stereoscope, but stereoscope is particularly useful in some cases:

① if other types of equipment are difficult for trainers; 

② As a means of training to expand the range and flexibility of fusion image; 

③ After successful convergence and dispersion training, eye movement or adjustment by non stereoscopic means. The main advantage of stereoscopic training is that there are a variety of visual targets that can be simulated for long-distance use. This type of training equipment is very useful for patients with excessive dispersion, and it can also be effective for patients with deep inhibition. The unnatural visual environment of stereoscope is its biggest defect. There are still problems in converting stereoscope to actual visual space after successful training.

Prints, pens and other equipment

This type of equipment includes equipment printed on paper for training convergence, dispersion, adjustment and eye movement. For example, lifebuoy cards, eccentric round cards, Hart tables, Brock lines, etc. these devices are relatively cheap and can also provide a variety of visual markers. Patients with mild to moderate inhibition can also use them. However, for children patients, these devices are also difficult to maintain their interest.