Contact lens manufacturing technology

A method known, in general, for Turnkey contact lens manufacture is static cast molding. Cast molding of contact lenses involves depositing a curable mixture of polymerizable monomers in a mold cavity formed by two mold sections, curing the monomer mixture, and disassembling the mold assembly and removing the lens. One mold section forms the anterior lens surface (anterior mold section), and the other mold section forms the posterior lens surface (posterior mold section).

Prior to the cast molding technology of the contact lens, each of the mold sections is formed. Conventional methods involve injection molding the molds sections from a resin in the cavity of an injection molding apparatus. Typically, the mold sections are used only once for casting a lens and then discarded.

Several cast molding methods have been found to offer the potential to reduce production time and cost for the manufacture of soft hydro gel contact lenses, since time-consuming and labor-intensive operations are avoided, such as lathing a contact lens from a button (or lens blank) or a semi-finished button (containing one finished surface).

However, various problems have been encountered in employing cast molding technology for manufacturing rigid; gas permeable (RGP) contact lenses. The design and surface quality of RGP contact lenses is more critical to achieve proper fitting than for soft contact lenses. In contrast to RGP contact lenses, soft contact lenses are flexible and, to a larger extent, will conform to the shape of the cornea when placed on eye. It will be appreciated that RGP contact lenses require stricture tolerances in the manufacturing process.

For more details on this, please browse www.cltech.com.sg.

Comments

Post a Comment

Popular posts from this blog

The ultimate guide to buying and wearing the right contact lenses

Your eyes are a precious deal for you, and that is why it is really important to choose the right  manufacturing contact lenses  for yourself so that you can make the right decision for your eye. Your choice depends on many factors like the refractive error and how much you can tolerate the wearing of contact lenses, your expectations with your eyes and how willing are you to take care of lenses and your eyes.  Here are some things that you need to consider while buying good lenses constructed with Cast moulding technology . How often are you going to wear contacts? This depends on how long and how much are you thinking of wearing contact lenses. Is it going to be only over the weekend or are you going to wear your contacts every day? If you are going for wearing contacts every day. then soft contact lenses are something that is not only going to be comfortable for you but they are fit for your daily consistent routine.  What do you think o...
Read more

Get the finest quality of contact lenses

  There are innumerable problems with people who wear spectacles. Have you ever experience it? Those unstable wearable during gym or dance classes or the geek look with ethnic dresses. These pieces of accessories have issues related to both genuine discomfort and aesthetic reasons. So, the best option here is to use contact lenses. You should never compromise with your look and comfort. This is the reason why there are so many retailers of these lenses. We all know that the Cast moulding contact lenses is in great demand due to a huge customer base. So, if you are into satisfying people with high-grade contact lenses then you have landed at the right place. We at CL Tech are following best industry practices to deliver robust and finest quality of contact lenses. We have advanced machines which are operated by skilled technicians to create products that are appreciated worldwide. We have over 100 years of experience in using and uplifting the Cast moulding technology. Being indu...
Read more

Everything you need to know before buying contact lenses

Well, it is normal for people to be confused when they are trying to buy their first contact lenses. You have to consider your lifestyle, the budget and the problems you are going to face when you start wearing them. Well, you do not have to worry about it. Contact lenses are more versatile than ever today. All you have to do is consider the pros and cons of cast molding contact lenses so that you prevent any eye infection that can affect your natural sight. The following are the different types of manufacturing contact lenses that are present in the market.  The soft contact lenses are the most used and prescribed by doctors' contact lenses. It can be used for all types of vision problems like myopia, hypermetropia, blurred vision, and age-related loss or any type of close-up vision. Not only are you comfortable and easier to adapt with, but you can use them as many times as you want with the right preservation in silicone hydrogel .  ...
Read more