The ability to clearly visualize each gp lens parameter has brought a new level of fitting clarity and success to our practice. Wave software recommends a starting custom lens design regardless of whether its a single vision, front surface multifocal toric or bitoric, ortho k, toricortho k. Our current software allows contact lens fitters to enter traditional patient information ks and spectacle rx, suggests the presence of certain pathology. This resulted in corneal distortion and problems such as increased i. Wave designs a custom lens that duplicates your corneas. Nov 04, 2010 of the 31 subjects that were assigned orthokeratology contact lens wear at baseline, an optimum lens fit was obtained in 21 subjects with the first contact lens fitted in accordance with the menicon professional easy fit software. Fitting mixed astigmatism with orthokeratology lenses eyespace. Of the 31 subjects that were assigned orthokeratology contact lens wear at baseline, an optimum lens fit was obtained in 21 subjects with the first contact lens fitted in accordance with the menicon professional easy fit software. These specialty contact lenses can be great for children, athletes, or those with jobs or lifestyles that make glasses or contact lens wear very difficult. Your doctor is trained to use wave contact lens design software to custom design a l e ns that perfectly fits your. Our roots go back to the very beginnings of orthokeratology and as such our board and membership not only represent the pioneers of orthok, but also those dedicated to pushing this field to new heights. Your doctor will specify the lens diameter and thickness for comfort and adjust the position of the optics for best visual performance.
The be free advanced ortho k lens system is a new evolution in myopia management with a software driven design. The designer has the option of four peripheralcentral lens design combinations. The orthotool software simplifies your workflow, saves you time, and helps you and your patients visualize complex lens designs. Software orthotool custom contact lens design software. Advances in highoxygen breathable lens materials, computeraided lens design software and precision lens shaping technologies, orthok night lenses are now safer, more comfortable, corrects a wider range of prescriptions and give more predictable results than was previously possible. These designs were flatfitting, commonly decentering up or down.
Ten subjects required a total of 35 adjustments to attain an optimum lens fit. Although orthokeratology is effective, it is only as effective as the commitment of the. The lens corneal angle of bearing can be best visualised and assessed by the cross section tear layer profile of the alignment zone. This course will introduce the most modern orthokeratology lens on the market today, the be free. Eye fitted with euclid systems orthokeratology oprifocon a contact lens. Efficacy of trial fitting and software fitting for orthokeratology lens. The following chart is from a study by wilcox and bartels. Software orthotool custom contact lens design software for. Research suggests that both trial lens fitting and software fitting approaches are effective in temporarily reducing myopia, providing good uncorrected visual acuity ucva and delaying the elongation of axial length for moderate and high myopic adolescents. Orthokeratology is a specialty type of contact lens fitting in which the patient wears correction overnight and is free from wearing visual correction during the day. Dr paul gifford consults with the contact lens industry on development of contact lens designs and their implementation into clinical practice. Custom design the lens using eyespace contact lens design software. You may have heard of them advertised as dream lenses by some practices.
New reverse geometry contact lens designs and materials have. Orthotool simplifies your workflow, saves you time, and helps you and your patients visualize complex lens designs. Slowing myopia down with orthokeratology clarendon. In general, crt can cost up to four times more than standard rigid gas permeable lenses due to the complexity of the lens design and the programs requirement that you visit your optometrist several times during treatment. Ther karrinyup, western australia abstract orthokeratology is the reversible technique of reshaping the cornea by structural changes to the corneal epithelial cells. Reducing treatment zone diameter in orthokeratology and. This orthokeratology product is not only a lens but a fitting system and philosophy that includes a revolutionary software platform.
Rozenberg earned his doctor of optometry, cum laude, from the southern california college of optometry. Night lens therapy providers actually capture a digital image of your corneas to create a finger print map right of your cornea. Myopia usually begins in childhood at school age six years and onwards and can worsen until early adult years. Fitting mixed astigmatism with orthokeratology lenses. Comparison of toric and spherical orthokeratology lenses. This empirically ordered lens requires corneal shape information along with the visible iris diameter and rx. This same fitting software helps construct the initial trial lenses, guides the practitioner through the initial custom lens selection and can aid in problem solving and lens optimization. Free version of the winlens3d optical design package, which provides serious design and analysis tools for optical engineer, student or designer.
Contact lens spectrum fitting orthokeratology contact lenses. The 8 to 18 market, referred to as tweens and teens, who have myopia benefit from orthokeratology with paragon crt contact lenses. It features a robust fitting software that predicts good from bad ortho k candidates prior to treatment. It took a long time to achieve only a shortterm reduction of myopia. Orthokeratology contact lenses reshape the cornea overnight to provide clear vision during the day without the need for contact lenses or glasses during those daytime hours.
Clinical trials which can be found in the research menu under orthokeratology orthok have reported slowing myopia 55% to 100%. Orthotool software enables optometrists to quickly design custom orthokeratology contact lenses for even complex cases. The program utilizes the mathematics of wavelet theory from topographic data and creates a digital signal to describe the cornea. May 22, 2018 while doctors first discovered that they could reshape lenses decades ago, orthokeratology is still a pretty new area of practice. Can orthokeratology lens design be modified to alter peripheral refraction. I have been using orthotool for the past few years for most of my initial orthok fitting and the success rate improved in a great deal when the diagnostic fitting was incorporated. Slowing myopia down with orthokeratology clarendon vision. It wasnt until recently that computerized corneal topography technologies and advancements in gas permeable lens design and manufacture made orthokeratology a good treatment option for myopia patients. Orthokeratology also referred to as orthok, ok, overnight vision correction, corneal refractive therapy, crt, and gentle vision shaping system, gvss refers to the use of gaspermeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia, hyperopia and astigmatism. Using the same wavefront technology as in wavefront guided lasik, a corneal mapping topographer captures 14,000 measurements of the entire corneal shape, and imports them into a highly sophisticated computer software lens design program. Myopia control with orthokeratology contact lenses in spain. For the practitioner who would like to begin fitting orthokeratology lenses, some useful tools are available. We are a nonprofit organization of practitioners and academics devoted to the science and education of orthokeratology and myopia control.
The be retainer is an orthokeratology lens design built entirely from corneal topography data. Research suggests that both trial lens fitting and software fitting approaches are effective in temporarily reducing myopia, providing good. Orthok lenses have a reverse geometry design consisting of three curves figure 2. Fitting orthok for a patient with high myopia global insight. With nearly 4 decades of experience in eye care and custom contact lens design, dr. The design of the ok lens would flatten the central cornea by the central flat zone. Ortho k lens calculation software suggested an initial lens design, however it was decided to flatten the suggested peripheral curves by 0.
Orthokeratology also known as orthok, ok, corneal reshaping, corneal refractive therapy, and vision shaping treatment is an alternative method to correct refractive errors using customdesigned rigid lenses to temporarily modify the curvature of cornea. The ideal fit is one where the lens corneal angle is slightly negative tear layer thickness reducing from inner to the outer aspect of the alignment zone in the horizontal meridian and slightly positive in the. Using a diagnostic fitting set, empirically ordering the lenses through consultation or designing a lens using topography software are other options when fitting orthok lenses figure 1. Our contact lens specialty service at pacific university uses the orthotool lens design software on a daily basis for many of our normal and complex patients that require customized rigid lens designs. Eyespace software for rgp lens design available at. Orthok are special nighttime contact lenses worn during sleep to restore clear vision without glasses. Some lenses are designed from flat keratometry flat k measurements, while custom lens design software may require eccentricity and apical radius of curvature measurements. In order to correct distance refraction with orthokeratology, i need to create 1.
Fitting orthok for a patient with high myopia global. Eyequip developed the wave contact lens design software, which enables practitioners to design single vision, front or back surface multifocal or orthokeratology rgp lenses. They note that the two approaches can be combined when fitting orthokeratology ok lenses. Pdf analysis of two orthokeratology lens designs and. Contact lens spectrum troubleshooting orthokeratology. The be free design offers a family of lenses for a wide range of potential orthokeratology patients. Wave trained doctors are skilled and certified to use wave contact lens design software for contact lens patients requiring correction of near or distance vision, astigmatism, combined reading and distance vision, keratoconus and post surgical corrections.
He is a partner in private practice conducting clinical research on use of contact lenses and orthokeratology to control progression of myopia, and holds an adjunct senior lecturer position at the. Orthokeratology is a nonsurgical treatment that uses precise, specially shaped contact lenses to temporarily reshape the cornea in order to eliminate nearsightedness or myopia so that you can see better at distance without wearing eyeglasses or regular contact lenses throughout the day most often the doctor will prescribe specially designed rigid gas permeable rgp contact. Orthokeratology a guide to overnight orthokeratology. By fitting the patient into a reverse geometry gas permeable lens, the practitioner can make controlled but temporary refractive changes to the cornea. Some lenses are designed simply from flat k measurements, while custom lens design software may require eccentricity and r 0 as well. Tangential maps for first pair at 1 month follow up. Waves custom designed lenses differ greatly from plain mass produced lenses. More designs including 5 controlled clearance orthokeratology designs.
Dreamlens orthokeratology art optical contact lens, inc. Wave corneal molding is the most advanced type of orthok. The eyespace software will automatically analyse the corneal shape. The central portion of the lens is the treatment zone or base curve bc.
Orthokeratology, or orthok for short, is a nonsurgical and reversible procedure in which customdesigned contact lens devices are used to gently reshape the cornea front surface of your eye. Our current software allows contact lens fitters to enter traditional patient information ks and spectacle rx, suggests the presence of certain pathology, makes lens design suggestions, and allows the user to point and click a number of different. Advances in highoxygen breathable lens materials, computeraided lens design software and precision lens shaping technologies, orthok. This lens is a proprietary 4 curve ok lens design comprising an aspheric back optic zone boz, two spherical intermediate curves and a peripheral tangent flat. I have been using orthotool for the past few years for most of my initial orthok fitting and the success rate. This empirically ordered lens requires corneal topography shape information along with the vid and rx. Euclid systems orthokeratology oprifocon a contact lenses are designed to purposely net match the shape of the cornea but instead apply slight pressure to tde center of the cornea, in a design known as reverse geometry. The ortho tool software purchase was the best investment that i ever made practicing orthok along with the trial set to define the lens design. Retrospective case studies, a less stringent study design, have show high rates of prevention.
In the most basic of terms accelerated overnight orthokeratology or orthok is the science of changing the curvature or shape of the cornea to change how light is focused on the retina at the back of ones eye. Aug 09, 2018 research suggests that both trial lens fitting and software fitting approaches are effective in temporarily reducing myopia, providing good uncorrected visual acuity ucva and delaying the elongation of axial length for moderate and high myopic adolescents. Orthokeratology lenses precision technology services. Fitting the dreamlens is straightforward and has been found to have a success rate over 90%. Euclid systems orthokeratology oprifocon a contact. While expertise in orthok lens design may seem more relevant for. Potential contact lens applications are outlined, including the design and oneye performance of singlevision lenses, lenses for presbyopes and keratoconics, orthokeratology, tear film studies. Orthotool is the current iteration of contact lens design, modeling, and manufacturing software which has evolved over the last 25 years. Rgp contact lenses design has never been more scientific and precise. Doctors also use wave software to create custom orthokeratology lenses, a gentle.
The dreamlens does not incorporate diagnostic fitting and only requires ks and spectacle rx for use with the dreamlens proprietary software design program. Orthokeratology orthok treatment for myopia prevention. Conference global council on myopia management 2019. Eyespace will intelligently design an appropriate forge myopia rotationally symmetric spherical or toric orthokeratology lens with the given corneal topography data. It is also known as corneal reshaping technology crt and lenses are worn while sleeping, giving you clear vision during the day without the aid of. The eyespace software is capable of simulating any type of rgp lens, from a simple rotationally symmetric gas permeable lens, right through to a quadrantspecific reverse geometry orthokeratology lenses. Euclid systems orthokeratology oprifocon a contact lenses. These lenses are larger in overall diameteroften 90% to 95% of the total hvid. It is a treatment that has been proven to be safe and. Your doctor is trained to use wave contact lens design software to custom design a l e ns that perfectly fits your eye and your needs. While doctors first discovered that they could reshape lenses decades ago, orthokeratology is still a pretty new area of practice. Developed using eyespace lens design software, forge orthokeratology lenses are the next generation of custom designed orthokeratology lenses. Orthok uses specially designed contact lenses to gently reshape the curvature of the cornea the front surface of the eye to bring the eye into correct focus.
Orthokeratology, also known as orthok, is a nonsurgical process that improves vision. The control lens was the pj design manufactured by capricornia contact lens pty ltd australia and manufactured in boston xo material. Fitting software is used to construct the initial custom order and optimize the results when modifications. Orthokeratology is defined as the temporary reduction in myopia by the programmed application of rigid gaspermeable contact lenses. Fitting software is used to construct the initial custom order and optimize the results when modifications are necessary. Myopia control with orthokeratology contact lenses in. Doctors also use wave software to create custom orthokeratology lenses, a gentle, reversible, nonsurgical vision correction procedure. The lenses were designed with an overall diameter of 10. Myopia management conference agenda global council on. American academy of orthokeratology and myopia control.
Perhaps in future designs, a combination of r 0 and eccentricity may become more widely used compared to flat k, as it better represents corneal shape with regard to orthokeratology. Orthokeratology often called orthok or ok lens for short is a form of safe, reversible and nonsurgical vision correction available to both adults and children. Forge orthokeratology available at innovative contacts. The forge orthok range of lenses has a number of designs capable of correcting a wide range refractive error, including astigmatism, and is available in rotationally symmetric, toric, and quadrant. Reducing treatment zone diameter in orthokeratology and its.
634 481 41 503 828 818 519 944 94 765 584 950 395 1532 632 436 1212 716 1268 539 914 1405 98 1137 281 601 897 788 1031 78 666 974 998 1187