Lenses

Contact lenses are usually used as an alternative to spectacles. They are placed directly on the cornea. They can be classified as hard or soft contact lenses. Soft contact lenses are made of flexible hydrophilic ("water-loving") plastics called hydrogels[1]. Hydrogel contact lenses Hydrogel contact lenses are made from polymers. These polymers contain chains of monomers linked together by cross-linking agents to form a polymer network. Since the cross-linking agents are few, there will be…

ARRI Master Prime Lenses – The Best Lenses In The Market ARRI Master Prime lenses are one of the best lenses in the market and considered as one of the highly sold lenses in the market. These lenses are available for hire online and videographer can rent these lenses to save cost on shooting short or long movie footages. As the costs are high, it is better to hire ARRI Master Prime lenses. These lenses have a fantastic optical performance and open up new and creative opportunities with features…

The impact of the use of contact lenses and glasses on eye Background : The contact lenses and glasses of modern techniques that help to improve the range of visions. But these techniques are not without side effects and multiple damage. The problem of the study: that the use of lenses and glasses may lead to various health damage such as: Corneal scars , redness , itching and others. The aim of study is to describe the resulting from the use of contact lenses and glasses among students…

Recent work done: Preparation of Fluconazole b-Cyclodextrin Complex Ocuserts: In Vitro and In Vivo Evaluation Hindustan Abdul Ahad and et. al. developed ocuserts containing fluconazole b- cyclodextrin. Erodible inserts • The solid inserts absorb the aqueous tear fluid and gradually erode or disintegrate. The drug is slowly leached from the hydrophilic matrix. • They quickly lose their solid integrity and are squeezed out of the eye with eye movement and blinking. • Do not have to be removed…

Soft toric contact lenses have long been used by physicians for patients with a wide variety of astigmatic prescriptions. Although these lenses provide good vision and initial comfort, symptoms such as dryness and variable acuity can develop 1–3. In the 1990s, hybrid lenses such as Saturn II and its successor SoftPerm were convenient and produced satisfactory visual outcomes in patients with regular and irregular astigmatism 4,5. However, adverse effects related to hypoxia and induced corneal…

advantages and disadvantages. When it comes to how your brain creates images and why they differ there are many different body parts that have a big effect. With that being said two materials that are used for eyeglasses are plutonite and the hydrophobic lense coating. These two materials are two of the most used for eyeglasses as they have many advantages that are not provided by other materials. There are also two major body parts in your eye that have the biggest effect on your vision. They…

possible however to test this kind of vision before having the procedure done permanently and that’s with the help of monovision contact lenses first. This will show you if you’re able to adapt to this kind of vision before undergoing something such as LASIK. If this does sound too permanent for your liking however then you can choose to wear monovision contact lenses as your long term solution instead of…

own nation. This chapter covers dSLR and compact cameras, underwater housings, lenses, palms, strobes, ports, TTL converters, sync & fiber optic cords, focal point lights, and equipment expenses. Earlier than we dive into a dialogue in regards to the…

prescription glasses or contact lenses,…

Swimming and Eye-Health: Important Things to Know A session of swimming leaves us rejuvenated and no matter how sore we feel physically, there is a freshness that surrounds us right from the moment we come out of the pool. However, the feeling is not so pleasant for all because several swimmers are left with a stinging and burning sensation around their eyes, which is quite uncomfortable. In fact, the problem is so common among even the avid swimmers that it is popularly termed as, “swimmer’s…