In pediatric ophthalmology clinics, we often see many “glasses babies”. Many parents think that children’s glasses are just smaller than adults’. What’s so special about them? The most important thing to know is that there are many special glasses, in addition to the usual farsighted, nearsighted and astigmatic glasses. Here we will introduce them one by one. Beijing Children’s Hospital Ophthalmology Cao Wenhong Beijing Children’s Hospital Ophthalmology Chu Huihui
I. Membrane compression spherical lens
The so-called membrane pressure paste lens, is the traditional thicker glasses lens “compression” into a very thin layer of membrane glasses. It includes high farsightedness pressure paste spherical lens and high myopia pressure paste spherical lens. These lenses are mainly suitable for.
1, 500 degrees or more of simple farsighted myopia.
2.After cataract surgery, aphakic eyes cause super high hyperopia or the residual refractive error after IOL implantation requires amblyopia treatment with lenses.
3.Provide magnification for low vision children to read without increasing the weight of the original glasses, etc.
We use the American three M company’s pressure paste spherical lens, farsightedness up to 1600 degrees, myopia up to 1400 degrees. This amazing glasses weight is only 1/4 of ordinary glasses, and the thickness is only 1/6! More than a thousand degrees of pressure paste lenses to wear like a couple of hundred degrees lenses, children wear more comfortable, lightweight, safe, parents no longer have to worry about the child’s thick “bottle bottom” glasses!
Second, the membrane pressure paste trigeminal lens
Membrane pressed prism is affectionately known by children as the “angel’s magic wand”. The reason why there is “angel magic” is because wearing it, not only can make the crooked head of the child’s head is not crooked, strabismus children’s eyes are not slanted, and beautiful, lightweight, does not affect vision. The design principle is to reduce the diameter of the prism block to 2mm, the bottom thickness is also reduced to 0.5mm, a row of reduced prism neatly laid flat arrangement, forming a film-type prism. Mainly applicable to.
1, over-correction or under-correction after strabismus surgery.
2, small degrees of strabismus in children with insufficient surgical volume
3, symptomatic occult strabismus or rotational strabismus, vertical strabismus.
4.Children with other systemic diseases that are not suitable for surgery for strabismus
5, younger children with strabismus who do not cooperate with the preoperative examination, as a means of protection for temporary transition before surgery
6, idiopathic nystagmus with crooked head vision.
7, several special types of strabismus, including DVD (vertical detached strabismus), fresh paralytic strabismus due to trauma such as orbital wall fracture and actinic nerve palsy, etc.
Traditionally fitted trigeminal degrees if more than 6-7 trigeminal degrees, or on top of the original myopia or hyperopia with trigeminal lenses, it exposes the disadvantages of thick lenses, heavy glasses, distortion of vision, etc., which are not easily accepted by children. The American three M company’s pressure paste trigonometry, break through the original fitting degree range, even the maximum fitting to 40 trigonometry degree, looks ultra-thin, lightweight, while overcoming the large number of trigonometry degree brought about by the visual distortion phenomenon. It is no wonder that a child once described it to us as “light and beautiful, it is like an angel’s magic wand, just a little bit, the magic of our eyes is immediately lifted!
III. Myopia Control Progressive Multifocal Lenses
A progressive multifocal lens is a lens that is used above for distance vision and below for near vision, with different degrees above and below. The transition from a fixed distance prescription above the lens to a fixed near prescription below the lens is not a sudden change, but rather a gradual transition between the two through a gradual change in refractive power. With the introduction of computer numerical control processing software, the formulation of progressive multifocal lenses is gradually injected with cutting-edge personalized optical design concepts such as free spherical technology, internal progressive technology, and wavefront phase difference technology. Especially for teenage students, progressive multifocal lenses for myopia control are designed to reduce or prevent the onset and progression of myopia by reducing near-use adjustments through the low convex lens below the lens for reading and writing, while the progressive lenses in the middle and above still provide clear and continuous mid- and long-range vision, overcoming the object-image jumping phenomenon of previous bifocal lenses. Therefore, whether in daily life or in reading and studying, myopia-controlled progressive multifocal lenses provide students with a higher definition, closer to the natural adjustment state of the eye environment.
Fourth, the new defocus myopia control glasses
The virtual focus myopia control glasses have five special structural layers: light sensitive layer, protective layer, angle of view magnification layer, relaxed adjustment layer, relaxed collection layer, based on these five design features, cleverly integrate the process of controlling myopia in reading and studying. When young students use their eyes at close range: it can simultaneously loosen the regulation and collection when looking at the near, and virtualize reading books, homework and watching TV into looking at distant scenery, thus eliminating the main motive of myopia development; it can cause negative collection, drive negative regulation, flatten the lens and make the eye tend to become round, thus causing the refraction of the eye to re-integrate in the direction of ortho-opia or hyperopia, so that part of the myopia can be reduced; it can magnify the perspective and increase the light sensitivity, thus eliminating eye fatigue. It can enlarge the angle of view and increase light sensitivity, thus eliminating the development of myopia caused by eye fatigue. It can prevent the development of myopia caused by harmful rays.
V. Cap glasses
Cap lenses are named because they look like a straw hat, with a thick middle and flat sides. It is a special resin lens with aspheric design principle, suitable for hyperopic children, especially for high farsightedness over 600 degrees, up to 1600 degrees. The advantage is that unlike pressed spherical lenses which are attached to the eyeglass lenses and will mildly affect the vision, pressed spherical lenses will age and change color over time; and the cap lenses are thinner and lighter than the ordinary resin lenses of the same degree, reducing the thickness of the lenses and the distortion of the vision, making the vision clear and natural and more comfortable to wear.
Six, amblyopia suppression film glasses
In the clinic, we often see some amblyopic children with inconsistent binocular vision needing masking training, the traditional approach is to use eye shields to cover the relatively good eye to promote the contralateral eye’s low vision as soon as possible. However, because the eye shield can be removed at any time, it is easy to peek and affects the aesthetics of the child, causing many children to fail to cooperate with the treatment, affecting the effect of amblyopia training. Now a new type of Bangerter amblyopia suppression film has been created. Its surface is composed of many tiny bumps, which can cause blurred vision. There are many different types of suppressive films with different levels of light transmission, and the sequential application of these films results in a gradual reduction in vision. They are applied to the lens of the healthy eye to block the depression to treat amblyopia. When the child wears these glasses, not only can the vision of the healthy eye be suppressed to the level of the amblyopic eye or slightly below, but the appearance of the two eyes is not much different and does not affect the aesthetics in any way, especially for school-age children at school. This technology breaks through the limitations of traditional eye wear and greatly increases the interest in amblyopia masking training for children, providing a faster cure for amblyopia.