Firstly, it is important to understand the types of lenses available. There are primarily two categories of lenses - glass and plastic. Glass lenses, although have better clarity, are heavier and more prone to shattering. Hence, plastic lenses are now more commonly used. Plastic lenses can be further divided into CR-39, polycarbonate, and high-index lenses.
CR-39 lenses are the standard plastic lenses and are made of a lightweight, impact-resistant material. These lenses have an index of 1.50 and are relatively cheaper. However, they are not as thin as the other two variants and are not recommended for people with higher prescription needs.
Polycarbonate lenses are thinner and lighter than CR-39 lenses and are highly impact-resistant. These lenses have an index of 1.59 and are suitable for people with active lifestyles or children. They are also recommended for people with high prescriptions as they can be made thinner without compromising on the durability.
High-index lenses are the thinnest and lightest of all plastic lenses. These lenses have an index ranging from 1.60 to 1.74 and are perfect for people with high prescriptions. They are also recommended for people who want thinner lenses without the distortion that comes with curved lenses.
Now, let's look at some factors that you should consider while choosing lenses for your eyeglasses.
Prescription Needs: Your prescription will play a crucial role in deciding which lenses to opt for. If you have a higher prescription, it is recommended to go for polycarbonate or high-index lenses.
Lifestyle: Your daily routine and lifestyle will also dictate which lenses to go for. If you have an active lifestyle, polycarbonate lenses are ideal as they are highly durable and impact-resistant. High-index lenses are perfect for people who want thinner and lighter lenses.
Budget: Your budget is also a deciding factor when it comes to selecting lenses. CR-39 lenses are the most affordable of all and are perfect for people on a tight budget. However, if you are willing to spend more, polycarbonate or high-index lenses are worth investing in.
Index: The index of the lens is an important factor to consider. Higher the index number, thinner and lighter the lens will be. If you have a high prescription, going for lenses with a higher index will help in reducing the thickness of the lens.
Quality: Lastly, the quality of the lens matters a lot. Always opt for lenses from reputed factories to ensure that you are getting a high-quality product.
In conclusion, choosing the right lenses for your eyeglasses requires careful consideration of various factors. Depending on your prescription, lifestyle, budget, and quality requirements, you can choose from the different types of lenses available in the market. Always opt for lenses from reputed factories to ensure that you get a high-quality product.