Types of Glasses Lenses and Their Differences

Types of Glasses Lenses and Their Differences  – There are many types of eyeglass lenses, be they negative lenses, positive lenses, progressive lenses, etc. Wearing glasses should not be haphazard, but must be adjusted to suit the needs of the eyes.

Types of Glasses Lenses and Their Differences

oakleysunglassesoutlet – Generally, children and teenagers often experience negative eye problems or nearsightedness due to staring at screens for too long. Meanwhile, adults usually experience positive eye conditions which are influenced by increasing age.

Most young people will experience negative eye problems or nearsightedness due to looking at screens at close range and for a long time. Because each individual has different eye conditions, the need for eyeglass lenses will also vary. Therefore, it is very important to first identify the following types of eyeglass lenses.

Types of Glasses Lenses Based on Function
So that you don’t make a mistake when buying glasses, you need to know the type of glasses lens and its function.

For example, if you have nearsightedness, you should choose glasses with positive lenses.

Here are several types of eyeglass lenses that you need to know:

1. Single vision lens
Single vision lenses only have one focus point, so these lenses are called myopic glasses because they function to clarify vision at a certain distance. As the name suggests, this lens is also known as a single lens.

These glasses are usually used by people with myopia (farsightedness), hypermetropia (farsightedness), and astigmatism or blurred vision (cylinders).

• Negative Lens
  Negative lenses are used to help people with myopia or nearsightedness. The focal point of the lens falls in front of the retina and is suitable for use when driving which requires long viewing distances. Therefore, negative lenses for farsightedness are very effective.
• Positive Lens
  Positive eyeglass lenses are used to help people with hyperopia or nearsightedness. Generally, positive lenses for farsightedness are used by older individuals to help with reading. Therefore, many people call positive glasses reading glasses.
• Cylindrical Lens
  For people with astigmatism or astigmatism, cylindrical lenses will help focus the light to one point so that the wearer can see clearly.

2. Bifocal lenses
The letter ‘Bi’ in bifocal means two, meaning that a bifocal lens has two focus points. Because this lens has two focus points, you can see objects at far and near distances at the same time. The placement of the two focuses on bifocal glasses lenses is usually at the top and bottom with a dividing line in the middle. The bottom of the lens functions to clarify the near focus point, while the top of the lens serves to clarify distance vision.

 

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3. Progressive or trifocal lenses
The next type of eyeglass lens is progressive lenses or trifocal lenses. This lens has three different focus points. The upper part is used for long distance viewing, the middle for medium distance, and the lower part for close distance. However, progressive lenses do not have a dividing line like bifocal lenses.

4. Transition or transition lenses
Transition lenses are a type of lens that is very popular because of their ability to change color. These glasses can change color due to polarized light. If you are indoors, the glasses lenses will appear clear like ordinary glasses. However, if you are in the sun, the lens color will automatically change to darker.

For those of you who have sensitive vision, this type of lens could be the right choice. By using transition lenses, you can protect your eyes from direct sunlight and thus avoid the dangers of ultraviolet rays. However, before deciding on the type of eyeglass lenses, it is a good idea for you to consult with a doctor first. Now consulting with a doctor is also easier, because you can communicate with a doctor online via the Rey application or in person. Even if you already have online health insurance from Rey, you can chat with doctors as much as you like, pay for medicines, receive inpatient treatment and even outpatient treatment at no cost.

 

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Types of Glasses Lenses Based on Material
You can also choose the type of eyeglass lenses based on the material. The following are various types of lens materials used for glasses.

1. Glass lens
Glass is one of the basic materials for eyeglass lenses that is often recommended. This is because these glasses are not easily scratched and can refract light well. Unfortunately, this lens tends to be a bit heavy when worn and can easily break if hit hard enough. Apart from that, glass type glasses can only be used for certain glasses frames or frame. The choice of this type of eyeglass frame is limited and not as much as other materials.

2. Plastic lenses
Plastic lenses are the most common and widely used type of glasses. Glasses lenses made from plastic are also suitable for use in everyday life.

3. Polycarbonate lenses
Polycarbonate lenses are made with a slim and lightweight design. So this lens is ideal for those who often do physical activities such as exercising. Different from plastic and glass lenses, the advantages of polycarbonate lenses are their resistance to impact and their ability to provide eye protection from ultraviolet (UV) rays.

4. Trivex lenses
Trivex lenses are a type of lens that has strength and weight comparable to polycarbonate. The advantage of this lens lies in its ability to bend light more effectively than polycarbonate, so users can enjoy clearer vision. Unfortunately, the price of trivex lenses is generally higher than polycarbonate lenses.

5. High index lens
High index lenses are thinner and lighter than polycarbonate and trivex. This type of lens is highly recommended for individuals who require significant visual correction. In addition, these lenses also provide eye protection from ultraviolet rays.

6. Photochromic lenses
Glasses with these lenses can be made of glass or plastic. Almost similar to transition lenses, photochromic lenses are also able to change color when exposed to sunlight. The unique thing about photochromic lenses is that the brighter the environment, the darker the lens will be. If your eyes tend to be sensitive to bright light and often do activities indoors and outdoors, these lenses will be very suitable for you.