Device description intacs corneal implants are an ophthalmic medical device designed for the reduction or elimination of myopia and astigmatism in patients with keratoconus kc so that their. Intacs segment is placed beneath the sinskey hook and carefully pushed forward with the intacs holder until the edge of the intacs has been advanced to 1 mm from the entry wound. Intacs corneal implants are indicated for the treatment of keratoconus, to fully or partially correct myopia or astigmatism in patients that need to restore their visual function and for whom a satisfactory correction of vision with contact lenses or with glasses is not possible, and for patients who wish to avoid a possible. Keratoconus is a progressive eye disease that results in thinning corneal tissue, causing the cornea to lose its natural curvature. How is the intacs procedure for keratoconus performed. Use of intacs in patients with keratoconus is an effective and costeffective procedure. Figure 1, whereas in eyes with central keratoconus intacs 0. Performance of the intacs inserts procedure, other than as specified in this booklet and the iintacs surgeon training manual for keratoconus, may result in an undesirable outcome. Request pdf on aug 1, 2003, bsb wachler and others published intacs for keratoconus vol 110, pg 1031, 2003 find, read and cite all the research you need on researchgate. Intacs are thin plastic, semicircular rings, which are surgically inserted under the surface of the cornea. Methods this retrospective, nonrandomized, comparative, consecutive case series studied 58 eyes of 43. Intacs in advanced keratoconus request pdf researchgate. Efficacy and safety of intacs sk in moderate to severe. Alio jl, shabayek mh, artola a 2006 icrs intacs for keratoconus correction.
The corneal pocket incision meridian was the preoperative steep meridian. The result is improper focusing of light rays on the retina and impaired vision. Treatment of moderate to severe keratoconus with 6mm. Brian typically combines intacs with the holcomb c3r crosslinking system two techniques for keratoconus that he invented. Intacs can be replaced with differentsize implants or removed for good. Intacs insertion is a procedure used to correct for small refractive errors like nearsightedness or astigmatism irregularly shaped cornea or for keratoconus coneshaped cornea. For keratoconus, intacs work by flattening the steep part of the cornea or cone to reduce vision distortions. Keratoconus is a condition that causes the cornea to thin and bulge out like a cone over time. Keratoconus and ectasia have been successfully treated with both intacs and corneal collagen crosslinking. Intacs inserts using the femtosecond laser compared to the mechanical spreader in. Updates on managements for keratoconus sciencedirect. Intacs inserts are placed under the surface of the cornea, preserving its structure and improving vision without the need for corneal transplant surgery. Twentysix subjects underwent singleeye treatment, and 24 subjects had both eyes treated.
They can be used for intacs optical zone 7 and intacs sk optical. What are the potential risks of the intacs procedure for. Intacs for keratoconus vol 110, pg 1031, 2003 request pdf. Intacs surgical eye implants for keratoconus webmd.
Intacs and ferrara rings are the more popular types of commercially available icrs for the management of keratoconus, intacs is available in 150 arc length segments with a hexagonal crosssection and various sizes ranging from 0. Intacs are tiny arcshaped plastic braces that are surgically placed within the cornea to reshape the cornea. Intacs, or corneal inserts, received fda approval for treating keratoconus in august 2004. Given the significant cost and potential side effects of intacs, and the possibility that keratoconus can be more effectively treated with keratoconus contact lenses, such as scleral lenses, this surgical procedure should not be considered as the primary treatment option for keratoconus. Nov 08, 2012 keratoconus and ectasia have been successfully treated with both intacs and corneal collagen crosslinking. To examine the safety and efficacy of intacs sk for moderate to severe keratoconus kc using femtosecond technology. Intacs are fda approved for keratoconus and may improve vision by making the cornea more round again.
Sep 06, 2017 the result is improper focusing of light rays on the retina and impaired vision. For example, a recent study conducted in china showed longterm stability of postlasik corneal ectasia after crosslinking without any relevant side effects. Kaiser permanente medical technology assessment criteria. Optical coherence tomography provides insight into the. Keratoconus 1 keratoconus this material will help you understand keratoconus, its causes, and how it may be treated. It is a bilateral, and asymmetric, corneal degeneration characterized by localized corneal thinning which leads to protrusion of the thinned cornea. To compare the results of intacs with kerarings when used in combination with collagen crosslinking for the treatment of keratoconus. Intacs for keratoconus official patient guide youtube. These tiny plastic inserts are placed just under the eyes surface in the periphery of the cornea and help reshape the cornea for clearer vision. Intacs surgical instruments consist of a series of ophtalmic instruments that are designed for the placement of intacs corneal implants.
Their original application was for the refractive correction of mild myopia. Keratoconus is a bilateral noninflammatory corneal ectasia with an incidence of approxi. Intrastromal corneal ring segments combined with collagen cross. It reshapes the cornea by flattening it closer to its original dome shape. Both intacs and corneal transplant surgery are able to treat keratoconus. Answer intacs are clear plastic arcs that are surgically inserted into the eye. Keratoconus intacs treatment canadian keratoconus foundation. Since, most patients have both procedures performed which are typically done on the same day. Keratoconus it is a clinical entity characterized by noninflammatory and noninfective, progressive, bilateral thinning of the cornea with ectasia of conical shape.
Title eyes levinger keratoconus managed with intacs, arch ophthal, oct 05 53 uusitalo treating keratoconus with intacs, jrs may 05 50 alio one or two intacs for correction of keratoconus, jcrs may 05 26 colin current surgical options for keratoconus, jcrs feb 03 0 tunc intacs for. The incision entry is closed with a single 100 nylon. The mean age of subjects in the study was 35 years, ranging from 20 to 73 years. Prospective, nonrandomized selfcontrolled comparative trial.
Intacs corneal implants are an ophthalmic medical device designed for the reduction or elimination of myopia and astigmatism in patients with keratoconus so that their functional vision may be restored and the need for a corneal transplant procedure can potentially be deferred. This study is being conducted under fda guidelines. Seventyfour eyes of 50 subjects 41 male and 9 female were evaluated. Intacs, corneal inserts for treatment of keratoconus and. They are indicated for use in patients undergoing ophthalmic surgery requiring a lamellar dissection of the cornea. Intacs surgery for keratoconus kc inserts treatment. Intacs are thin plastic, semicircular rings inserted into the mid layer of the cornea. The product is designed with a fixed outer diameter and width. The corneal implants are designed for longterm vision correction. Intacs corneal implants intacs corneal implants and intacs sk corneal implants.
Intacs instruments technical sheet intacs for keratoconus. Longterm study must be conducted to ascertain the impact intacs inserts treatment has on the natural progression of keratoconus. Pdf intacs addition technology, des plaines, il surgery has become a standard procedure in the. Intacs, corneal inserts for treatment of keratoconus and ectasia. Addition technology inc, sunnyvale, california is 1 treatment option available for patients with keratoconus, especially. Results of using intacs inserts for treatment of keratoconus must be compared with those currently achieved by pk. Intacs is the trademark name for microthin prescription inserts which were previously used as a form of refractive surgery in the treatment of low levels of myopia or nearsightedness, but has recently received fda approval for keratoconus. Objectives to describe the visual outcome of keratoconus managed with intacs implantation addition technology inc, fremont, calif and to define criteria that predict good outcome. Answer this outpatient surgery is to insert a plastic arc in your eye to reshape the cornea. In this procedure, small plastic semicircular rings are placed beneath the surface of the cornea which help smooth the shape of the cornea.
If you are a us citizen, please select the us site. Keratoconus nomogram is developed by ajl ophthalmic, s. Keratoconus is a bilateral, asymmetric, chronic, initially progressive ectasia of the cornea characterized by steepening, distortion, and thinning of the apical cornea as well as corneal scarring. Intacs inserts for treating keratoconus oneyear results joseph colin, md,1 be.
The goal of the clinical trial is to study the benefits and safety of the combined intacs and cxl as well as to evaluate the. Complications of intrastromal corneal ring segments springerlink. Intacs is the trademark name for microthin prescription inserts which were previously used as a form of refractive surgery in the treatment of low levels of myopia or nearsightedness, but have recently received fda approval for keratoconus. The use of intracorneal ring segments in keratoconus cyberleninka.
A similar maneuver is performed for inserting the superior intacs segment. An educational video about how intacs corneal implants help keratoconus patients who cant wear their contact lenses avoid a. A modified intacs procedure was performed on subjects with keratoconus. Treatment of moderate to severe keratoconus with 6mm intacs sk. To evaluate the use of intacs microthin prescription inserts kera vision, inc. Incision location and placement of intacs inserts for treating. In moderate and advance cases of keratoconus, a hemosiderin arc or circle line, commonly known as fleischers ring, is frequently seen around the cone base. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Intacs are clear plastic arcs that help flatten the cornea to treat keratoconus. To achieve maximum impact on keratoconus and improvement in your vision. In this prospective, noncomparative, interventional case series study performed in dena hospital, shiraz, iran, thirtyseven eyes of thirtysix patients with moderate to severe keratoconus, clear central cornea, and contact lens intolerance were enrolled and underwent intacs sk corneal ring segment implantation. Intacs is the trademark name for microthin prescription corneal implants designed for the reduction or elimination of myopia and astigmatism in patients with keratoconus.
The cornea is the clear window in the front of the eye see picture on the right. Physician booklet intacs corneal implantskc page 2 i. This line has been suggested to be an accumulation of iron deposits from the tear film onto the cornea as a result of severe corneal curvature changes induced by the disease andor due to modification of the normal epithelial slide process. Keratoconus is a bilateral noninflammatory corneal ectasia with an incidence of approximately 1 per 2,000 in the general population. The study included 34 eyes of 34 keratoconus patients who underwent symmetric intacs sk icrs implantation.
Presented in part at the american academy of ophthalmology annual meeting, dallas, texas, october 2000. To prospectively study the effects of the use of intacs microthin prescription inserts for the management of keratoconus. Keratoconus, which was first described in detail in 1854, derives from the greek words kerato cornea and konos cone. Objectives to describe the visual outcome of keratoconus managed with intacs implantation addition technology inc, fremont, calif and to define criteria that predict good outcome methods this retrospective, nonrandomized, comparative, consecutive case series studied 58 eyes of 43 patients with keratoconus managed by intacs implantation. In 1996, intacs technology, one of the first com panies that designed the icrs, received the ce certifica tion and later in 1999, the fda approval for the. Click the blue links below to download and read the available pdfs. Title eyes levinger keratoconus managed with intacs, arch ophthal, oct 05 53 uusitalo treating keratoconus with intacs, jrs may 05 50 alio one or two intacs for correction of keratoconus, jcrs may 05 26 colin current surgical options for keratoconus, jcrs feb 03 0 tunc intacs. Intacs are a wonderful treatment tool to deal with keratoconus and. This prospective, noncomparative study included 37 contact lens intolerant keratoconic eyes stage iiiii of 24 patients who underwent. Thats a condition that makes the cornea, the clear front part of your eyes, bulge out like cones.
What are the potential risks of the intacs procedure for keratoconus. Keratoconus, we are participating in a formal study of the effect of combined intacs and cxl in patients with keratoconus or corneal ectasia after previous lasik or prk. Narayana nethralaya was the first hospital to introduce intacs in the country in 2005. The use of intacs inserts in the treatment of keratoconus does not meet the. Intacs are very small clear plastic arcs that are designed to be inserted into the substance of the cornea in people who have keratoconus and who can no longer see properly with glasses or contact.
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