When you are one of the people with high astigmatism
Compared to people with ordinary myopia, those with high astigmatism often have higher requirements for lenses when getting eyeglasses. If the lenses are not suitable, even if the prescription is accurate, symptoms such as dizziness, fatigue, double vision, and blurred vision may occur. Wearing unsuitable lenses for a long time will not only result in a poor visual experience but also increase eye fatigue and may even lead to a continuous increase in the degree of myopia.
Generally speaking, astigmatism exceeding 150 degrees is considered relatively significant; if it reaches 200 degrees, 300 degrees, or even higher, it will have a more significant impact on visual clarity and wearing comfort.
The core cause of astigmatism is an irregularity in the eye's refractive system, preventing light from focusing on the retina. Patients with high astigmatism have even greater refractive errors, requiring lenses with significantly higher precision, craftsmanship, and fit than regular eyeglasses. It's not simply a matter of choosing the right prescription; therefore, the following points should be considered when selecting lenses:
- Strictly Control Lens Precision
High astigmatism requires extremely high precision in cylinder power, spherical power, and axis. Even a 5° deviation in axis can cause distorted vision, double vision, and dizziness. Ordinary pre-made lenses have significant errors and are only suitable for low-degree astigmatism, failing to meet the correction needs of high astigmatism.
Therefore, high-precision custom-made lenses must be selected for high astigmatism. These lenses rely on accurate optometry data to match a specific power and axis, strictly controlling manufacturing errors to ensure that light is precisely focused on the retina. This addresses the root cause of blurred vision and double vision, reducing the need for excessive eye accommodation and significantly improving visual comfort.
- Professional Selection of High-Quality Materials
The most common problems with glasses for high astigmatism are thick lenses that press against the nose and restrict vision. This is caused by improper material selection. Ordinary Resin Lenses are not adequately designed for high astigmatism refractive correction. With each prescription, the lenses become thick at the edges and have poor light transmission, resulting in an unattractive appearance and impaired vision.
Therefore, people with high astigmatism should choose thin resin lenses with high refractive index and high Abbe number. High refractive index materials effectively reduce lens thickness, eliminating the feeling of heaviness, and fit various frames, making them lightweight and comfortable to wear. A high Abbe number reduces chromatic aberration and visual distortion, ensuring clear and realistic vision. In addition, choosing wear-resistant and impact-resistant materials ensures both safety and durability for daily wear.
- Matching Functions to Needs
Modern people spend long hours in front of electronic screens such as mobile phones and computers, creating a complex visual environment. People with high astigmatism have even more sensitive and vulnerable eyes. Lens functions can be selected according to the specific visual scenarios to achieve eye protection while providing precise correction.
For students and office workers who spend long hours in front of electronic screens, anti-blue light and anti-glare lenses are available to filter harmful blue light, reduce screen glare, and relieve eye dryness and fatigue. For those who frequently travel or work outdoors, UV-protective and Photochromic Lenses are recommended to protect against UV damage and adapt to varying lighting conditions. It is important to note that adding functions must be based on precise correction; one should not blindly pursue multiple functions while neglecting the core corrective accuracy of the lens.
When getting glasses for high astigmatism, it's crucial to avoid making do. Accurate eye exams and adequate prescriptions are essential, ensuring the correct lenses and frames are chosen. Glasses tailored to your individual visual needs can effectively improve double vision and blurred vision, easily relieve eye strain, and provide greater comfort and clearer vision.