Early surgical correction of strabismus is needed in young children and children with strabismus, but for young children with strabismus, overcorrection and undercorrection of strabismus can easily occur after general anesthesia surgery due to the child’s lack of cooperation in various strabismus examinations and unbalanced binocular vision. We have used a membrane-pressed trigeminal lens to treat children with small degrees of strabismus and strabismus after surgery, and have achieved good results.
The advantages of wearing a diaphragm-pressed trigon: it protects the child’s binocular vision and provides an effective “protection period” for the child’s binocular vision when he or she is older. The disadvantage of wearing ordinary glass or resin prisms in the past: the lenses are very thick and can only be worn in one eye for strabismus treatment.
This new membrane prism is imported from the United States, it is in the 0.5 mm thick base, parallel arrangement of multiple small prisms of the same degree, so as to greatly reduce the weight and thickness of the prism, so that wearing a larger degree of the prism becomes possible. Because of the use of special plastic, it can be pressed onto ordinary eyeglass lenses and can treat strabismus up to 30△ in one eye. This has greatly expanded the scope of strabismus treatment with pressed trigeminal lenses and has provided a new means of treatment.
This new technology can be used for some strabismus patients who are too young to be treated with the transitional treatment of compression trigeminal lenses and then operated when the child is a little older, so that the visual function of both eyes can be well protected during this period of time, while the compensatory head position disappears due to the corrected eye position of the compression trigeminal lenses, so that the child’s spine and bones can develop normally and the facial deformity caused by the compensatory head position can be avoided.
Membrane compression trilobes can correct large strabismus. The refractive power of the prism is determined by the size of the angle of the prism, and a prism with the same angle will have the same refractive power. The thickness of the prism is related to the length of the two sides; the longer the side, the thicker the base. If the length of the two sides is shortened to very small, the angle remains the same, but its thickness will become very thin. Usually, glass prisms can only be worn in one eye7△ for strabismus treatment.
According to the shortage of glass prisms, in recent years, the United States invented a 0.5 mm thick base, parallel arrangement of multiple small prisms of the same degree, which greatly reduces the weight of the prism, thickness, so that wearing a larger degree of the prism is possible.
Since it is made of special plastic, it can be pressed onto the eyeglass lens, and the maximum prescription can reach 30△. This will expand the scope of use of pressed trigonometry in the eye muscle and provide a new means of treatment.
Although the prism is transparent, the reflection of the prism can reduce the visual acuity, and the larger the prescription, the more obvious it is, and it is said that 20△ can reduce the central vision from 1.0 to 0.5. There are distortions and distortions in vision, and there is a sense of jumping in vision. Therefore, it is not as complete a substitute for glass trigonometry and suitable for all cases as one might think.
For some young strabismus patients, the use of compression trigonometry transitional treatment, when the child is old enough to cooperate with the surgical examination, and then perform surgery, so that during this period of time, the child can get good protection of the visual function of both eyes, and at the same time, due to the compression trigonometry correction of the eye position, compensatory head position disappeared, so that the child’s spine, bone normal development, to avoid the legacy of compensatory head position caused by facial deformities.
Pressed and taped trigeminal lenses can correct large strabismus –
In clinical practice, some children with strabismus cannot receive surgical treatment for various reasons, and pediatric ophthalmologists often give children a pair of trigeminal lenses for transitional treatment, but there are many disadvantages of the traditional trigeminal lenses we usually use. For example.
1, the prism is relatively thick.
2, the weight of the glasses is large, the child is not easy to accept.
3, the prismatic effect of the trigonometric prism caused by the distortion of the visual object.
For all these reasons, resulting in the use of our domestic prism is relatively limited. We have introduced the American 3M membrane prism to correct children’s strabismus with very good results. The indications for the treatment of strabismus in children have been greatly widened due to the use of this American high-quality membrane-pressed prism.
We treat a number of childhood strabismus disorders with membrane-pressed trigonometry.
1.Overcorrected strabismus after surgery.
2.Undercorrected strabismus after surgery.
3.Small degree strabismus in children.
4.Children with strabismus that is not suitable for surgery.
5.Children who are too young to cooperate with the preoperative strabismus examination.
6.Special types of strabismus (DVD, orbital wall fracture, retrobulbar syndrome, smiling strabismus, motoneurotic nerve palsy).