&lt;p&gt;Historical Development, Applications and Advances in Materials Used in Spectacle Lenses and Contact Lenses&lt;/p&gt;

Pillay, Rayishnee; Hansraj, Rekha; Rampersad, Nishanee

doi:10.2147/opto.s257081

Cited by 26 publications

(15 citation statements)

References 20 publications

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“…In 1936, a hybrid contact lens was designed, consisting of a central glass part corresponding to the cornea and a peripheral scleral PMMA portion. After this, the scleral lenses were created from PMMA for both central (corneal) and peripheral (scleral) portion [1]. After PMMA was found to cause corneal hypoxia, new materials were created.…”

Section: Introductionmentioning

confidence: 99%

“…Further improvements included the addition of other components, such as styrene and fluorine, to improve biocompatibility, leading to the development of fluorosilicone acrylate material in 1987. GP contact lenses are usually created from fluorosilicone acrylates, have been and are still used for the treatment of keratoconus, for the correction of high astigmatism and in orthokeratology [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Study of Myopia Correction Using Nanoporous Polymer Gas Permeable Contact Lenses

Salavastru¹,

Niagu²,

Macovei³

et al. 2022

Mater. Plast.

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Ophthalmic treatments using contact lenses are now used by more and more specialists around the world. Improving contact lens (CL) materials is a condition that is constantly evolving. Contact lens materials are usually composed of polymer hydrogel or silicone hydrogel. The materials used for night contact lenses are gas permeable and they gradual flatten the center of the cornea which decreases the progression of myopia or myopic astigmatism. The aim of this study is to identify, in correlation with the chemical interactions between structural components of contact lenses and their biocompatibility with the surface layer and microtopography of the cornea or sclera, different incidents that occur in patients who have used rigid gas permeable contact lenses. The study was performed on a group of 10 patients who had a follow-up period between 4 and 6 years, who presented regularly for eye examinations. The following clinical parameters were analyzed: ocular refraction before and after wearing night contact lenses, types of contact lens materials, appearance of corneal topography, biomicroscopic examination of the anterior segment of the eye, keratometry, ocular comfort, as well as other incidents regarding this type of lenses. Difficulties caused by wearing contact lenses at night arose due to poor hygiene and maintenance in two cases or due to interruption of lens wear in one case.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Myopia Correction Using Nanoporous Polymer Gas Permeable Contact Lenses

Salavastru¹,

Niagu²,

Macovei³

et al. 2022

Mater. Plast.

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show abstract

“…The materials used for contact lens manufacturing are usually composed of polymer-hydrogel or silicone-hydrogel. CL were initially created from glass until the introduction of polymethylmethacrylate in the 1930s [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

“…Gas permeable materials are typically produced from fluorosilicone acrylates. Gas permeable contact lenses are used for keratoconus treatment, for correcting high astigmatism, and are also used in orthokeratology [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Night contact lenses used for myopia – personal experience

Bogdănici

Niagu

Bejan

et al. 2022

rjo

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“…To date, the most promising tool is the incorporation of active principles into contact lenses [ 7 , 8 , 9 ]. Although the primary use of contact lenses is related to the correction of ametropia, there is a growing interest in their application as therapeutic devices for several purposes: Maintaining corneal epithelial hydration, relieving eye pain, promoting corneal healing, as well as controlled drug administration for the treatment of ocular diseases [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Contact Lenses as Ophthalmic Drug Delivery Systems: A Review

Franco

Marco

2021

Polymers

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Ophthalmic drugs used for the treatment of various ocular diseases are commonly administered by eye drops. However, due to anatomical and physiological factors, there is a low bioavailability of the active principle. In order to increase the drug residence time on the cornea to adequate levels, therapeutic contact lenses have recently been proposed. The polymeric support that constitutes the contact lens is loaded with the drug; in this way, there is a direct and effective pharmacological action on the target organ, promoting a prolonged release of the active principle. The incorporation of ophthalmic drugs into contact lenses can be performed by different techniques; nowadays, the soaking method is mainly employed. To improve the therapeutic performance of drug-loaded contact lenses, innovative methods have recently been proposed, including the impregnation with supercritical carbon dioxide. This updated review of therapeutic contact lenses production and application provides useful information on the most effective preparation methodologies, recent achievements and future perspectives.

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<p>Historical Development, Applications and Advances in Materials Used in Spectacle Lenses and Contact Lenses</p>

Cited by 26 publications

References 20 publications

Study of Myopia Correction Using Nanoporous Polymer Gas Permeable Contact Lenses

Study of Myopia Correction Using Nanoporous Polymer Gas Permeable Contact Lenses

Night contact lenses used for myopia – personal experience

Contact Lenses as Ophthalmic Drug Delivery Systems: A Review

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