Canthoplasty is a cosmetic surgery that adjusts the shape of the canthus and increases the width of the palpebral fissure. Its main purpose is to improve the appearance of the eyes, making them appear larger and more lively. For many people who seek beauty, in addition to aesthetic appeal, the question of "whether canthoplasty improve vision" is also quite common. This article will analyze in detail the impact of canthoplasty on vision from the perspectives of eye anatomy, the principles of canthoplasty, the mechanism of vision formation and related clinical research.
Eye anatomy and the basis of vision
The visual function of the eye mainly depends on the coordinated work of the internal structures of the eyeball, including the cornea, lens, retina and optic nerve. The cornea is responsible for the refraction of light, the lens adjusts the focal length, the retina converts light signals into nerve signals and transmits them to the brain, and the optic nerve undertakes the key task of signal transmission. Visual clarity and vision mainly depend on the health status and functional integrity of these structures.
The eyelids (including the inner and outer canthi) play an important role in protecting the eyeball, preventing foreign body invasion, and maintaining tear distribution. Adjusting the position of the inner canthus (i.e. the eye head) and increasing the length of the palpebral fissure through surgery can improve the visual width of the eye, but they are not directly involved in the formation of vision.
The principle and implementation method of canthoplasty surgery
Canthoplasty surgery is usually divided into two categories: inner canthus enlargement and outer canthus enlargement. Inner canthus enlargement is more common. The surgery removes part of the excess skin or folds at the corner of the eye and rearranges the structure of the canthus, thereby increasing the lateral length of the palpebral fissure and making the eyes look bigger and more lively.
The inner canthus contains the lacrimal caruncle structure and lacrimal puncta. The surgery requires precise operation to avoid damaging the lacrimal duct system. The focus of the surgery is to adjust the appearance width and shape of the palpebral fissure rather than changing the optical structure of the eyeball . After the surgery, the visual range of the field of vision is expanded to improve the visual effect, but it does not directly change the visual acuity or refractive state.
Scientific evidence on whether canthoplasty improves vision
Judging from the definition and formation mechanism of vision, vision mainly reflects the optical and neural conduction functions of the eyeball and optic nerve. Canthoplasty surgery belongs to eye soft tissue plastic surgery and does not involve key visual tissues such as the cornea, lens or retina. Therefore, canthoplasty surgery itself does not have the function of improving vision problems caused by eye diseases such as refractive errors, cataracts or retinal diseases.
However, canthoplasty surgery may bring about the following indirect changes in visual experience:
Expanded visual field : When the palpebral fissure widens, the visible range of the eye increases slightly, making objects at the edge of the field of vision easier to detect and giving the feeling of expanded visual range, but this has nothing to do with the clarity of vision.
Reduced visual obstruction : For some individuals whose vision is partially obstructed due to narrow palpebral fissures or thick inner canthus skin, surgery can alleviate the obstruction and improve visual comfort.
Psychological effects : Changes in appearance enhance self-confidence, which may make patients more positive about their visual experience and indirectly improve visual attention and subjective perception.
Clinical research and practical experience
Many clinical observations have pointed out that the impact of canthoplasty on visual function is mainly to improve the field of vision and visual comfort, rather than to change the vision itself. For example, for patients with severe Mongolian folds that cause obstructed vision, canthoplasty can improve visual impairment and reduce the pressure of the eyelid margin on the field of vision.
However, risks during the operation, such as incision scars, tear duct damage, and postoperative swelling, may affect visual perception in the short term and need to be carefully evaluated. If the operation is not performed properly, it may cause incomplete closure of the palpebral fissure or eyelid dysfunction, which in turn affects the eye's protective mechanism and indirectly has an adverse effect on visual health.
Indications and limitations of canthoplasty
The indications are mainly focused on improving the appearance of the eyes. It is suitable for those with narrow palpebral fissures, obvious Mongolian folds, and small eyes. The surgery aims to enhance the beauty of the eye contour and the liveliness of the eye expression.
Canthoplasty is not suitable for vision correction, refractive surgery alternative, nor can it be used to treat eye diseases. Vision problems should be examined and treated by an ophthalmologist, such as fitting glasses, laser correction or surgery to treat intraocular diseases.
Comprehensive evaluation of the relationship between canthoplasty and vision
Canthoplasty surgery changes the appearance structure of the eye by widening the width of the palpebral fissure, making the eye look larger and partially improving the perception of the edge of the visual field.
The clarity of vision is closely related to the internal structure of the eyeball , and soft tissue adjustments cannot improve refractive error or retinal function.
On a psychological level , an improvement in appearance may increase satisfaction with the visual experience, but it does not mean that vision itself has improved.
The risks of surgery need to be fully assessed , and protecting the tear duct and eyelid function during surgery is extremely important for postoperative visual comfort.
Beauty Encyclopedia Tips: Canthoplasty surgery is mainly used to improve the appearance of the eyes. It increases the visual range by adjusting the width of the palpebral fissure, but it does not directly improve vision or the optical function of the eyeball. Vision problems should be diagnosed and treated by a professional ophthalmologist. If you have visual impairment, it is recommended to receive a professional ophthalmological examination first to avoid delays in treatment due to improper surgical expectations. When choosing canthoplasty surgery, you should consult an experienced doctor to comprehensively evaluate your eye health and ensure surgical safety and visual function.