Selection optical It is a complex process that requires attention to detail and medical conditions. Many people mistakenly believe that it is enough to buy a beautiful frame, but the wrong choice can cause serious harm to eye health. In this article, we will discuss all the nuances that will help you make an informed decision.
Vision is one of the most important senses of a person, and its correction should be carried out professionally. Modern technologies allow you to create lenses with unique properties, but the illiterate use of these technologies turns them into a useless accessory. Accurate diopter correction is possible only after a comprehensive diagnosis by an ophthalmologist, and not just in optics at the seller.
You will not just choose an accessory, but a medical product that you will wear daily. The quality of the materials and the accuracy of the assembly depends on your comfort throughout the day. Let’s look at the main stages of this process to exclude possible errors.
Diagnosis of vision and prescription
The first and most important step is to visit a specialist to check your visual acuity. The doctor is doing autorefractometry subjective evaluation to determine the exact parameters of the correction. Without this stage, any further action is meaningless and can be dangerous.
After the diagnosis, you will receive a prescription that will specify the necessary diopters for each eye. It is important to understand the difference between spherical and cylinder lenses, as they are used to correct different types of astigmatism. Do not try to interpret this data yourself.
Often, patients ignore the interpupil distance, which leads to rapid eye fatigue. When ordering a product, be sure to make sure that this parameter is taken into account by the master optician. An error in the calculations can cause headaches and double images.
Selection of lens material
The modern optical industry offers a wide range of materials, each with its own advantages. The main options are mineral glass and various types of polymers. The choice depends on your lifestyle and safety requirements.
Mineral lenses are highly resistant to scratches, but they are heavier and can break on impact. Polycarbide analogs are lighter and safer, making them ideal for children and active sports. However, their surface is softer and requires more careful care.
For high diopters, it is recommended to choose materials with high refractive. This makes the lens thinner and lighter while maintaining optical properties. The thick edges of the glass not only look ugly, but also create visual distortions.
What is the refractive index?
The refractive index is a quantity that shows how much a material is able to change the direction of a light beam. The higher the index (1.6, 1.67, 1.74), the thinner the lens can be at the same optical strength. For diopters above -4.0 or +2.0, it already makes sense to think about high-index materials.
Coating types and filters
The quality of vision depends largely on the surface. functional. The basic option is a hardening layer that protects against minor damage. Without it, any lens will quickly lose its appearance.
Anti-reflective coating (anti-reflection) increases transparency and reduces eye fatigue, especially when working at a computer. It removes glare from artificial lighting and headlights of oncoming cars in the dark. This greatly improves the comfort of driving and working.
There are also special filters that block the blue spectrum of radiation from screens. Although the scientific evidence on their effectiveness varies, many users have noted a decrease in dry eyes. It is important not to confuse them with full-fledged sunscreens.
- 🛡️ Hardening The coating protects against scratches when rubbing.
- 💧 hydrophobic The layer repels water and greasy spots.
- 🌫️ Antistatic prevents dust from swelling to the surface.
- ☀️ photochrome It automatically gets dark in bright light.
Wipe glasses only with a special microfibre napkin, pre-moistened with an optics spray. Dry wiping with a cloth of clothing or paper towels creates micro scratches that cloud the view over time.
Selection of frames by face shape
Choice frames It is not just a question of fashion, but also of ergonomics. The shape of the frame should be in harmony with the geometry of your face, emphasizing the advantages and hiding the disadvantages. Incorrectly selected frames can visually distort the proportions.
For a round face, angular and rectangular shapes are suitable, which add clarity to the lines. Owners of a square face should look at the oval or round models to soften the angles. The universal variant is considered to be the form of "cat's eye" or classic aviators.
When choosing, it is also important to take into account the landing on the nose and the width of the temporal arcs. The frame should not press on the whiskey or slide when tilting the head. Comfortable fit ensures the correct centering of the lenses in front of the pupils.
☑️ Checking the settings
Comparison of frame materials
Durability and comfort of wearing directly depend on the material from which the frame is made. Metal structures are strong but can cause allergies in sensitive people. Plastic models are lighter, but require careful handling.
Titanium frames are considered the standard of quality due to their lightness and hypoallergenicity. They do not oxidize and retain their shape even after long-term use. However, their cost is much higher than that of standard alloys.
The table below compares the main characteristics of popular frame materials:
| Materials | Weight. | Strength | Price. |
|---|---|---|---|
| Cellulose acetate | Medium. | Tall. | Medium |
| Stainless steel | Heavy. | Very high. | Low. |
| Titan | Very light. | Tall. | Tall. |
| Polyamide | Lightweight | Flexible. | Medium |
Titanium frames are the best choice for those who wear glasses constantly, as they minimize pressure on the nose and ears.
Care and maintenance
Even the most expensive and high-quality glasses require proper care to maintain their properties. Regular cleaning prevents the accumulation of bacteria and fat deposits. Ignoring hygiene can lead to inflammatory eye diseases.
Use only special washing products, as household chemicals can destroy protective coatings. After washing, wiping should be done in soft movements without strong pressure. Store the product in a hard case to avoid mechanical damage.
⚠️ Attention: Never leave your glasses in the sun in the car. High temperatures can deform the plastic frame and spoil the special coatings on the lenses.
Periodically check the condition of the fasteners and, if necessary, tighten them. The unbalanced design will lead to improper landing and displacement of optical centers. If you notice that the glasses began to sit crookedly, contact the salon for professional editing of the bows.
Can I wash my glasses with soap?
Use of regular soap is not recommended, as it often contains fatty additives and alkalis that destroy the enlightening coatings. It is better to use a special spray or soft remedy for washing dishes without additives.
Frequently asked questions
How often do I need to change my glasses?
Adults are advised to have their eyes checked once a year and children every six months. Change the glasses should be as the diopters change or discomfort appears, as well as when scratches appear on the lenses.
Is it harmful to wear other people's glasses?
Yes, wearing other people's glasses with inappropriate diopters causes severe overstrain of the eye apparatus. This can lead to headache, nausea and temporary vision impairment.
Is it true that glasses ruin your eyesight?
No, properly chosen glasses do not spoil the vision. On the contrary, they take the load off the eyes. The myth of harm arose from cases of improper selection or wearing glasses with incorrect diopters.
Which is better, lenses or glasses?
Both options have their advantages. Contact lenses give a wider field of view and do not fog, but require strict hygiene. Glasses are safer for eye health and easier to care for, but limit lateral vision.
⚠️ Attention: If after buying new glasses you experience dizziness for more than 3-5 days, be sure to consult a doctor. It is possible that the parameters are chosen incorrectly or that a period of adaptation is required, which should not be too long.