{"id":1096,"date":"2020-11-15T20:30:29","date_gmt":"2020-11-16T01:30:29","guid":{"rendered":"http:\/\/72.52.162.119\/~casavision\/?page_id=1096"},"modified":"2020-11-20T15:18:11","modified_gmt":"2020-11-20T20:18:11","slug":"etudes","status":"publish","type":"page","link":"https:\/\/casa-vision.com\/fr\/etudes\/","title":{"rendered":"\u00c9tudes"},"content":{"rendered":"\t\t
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\u00c9tudes<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\u00c9tude scientifique<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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*En anglais seulement<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Comparaison de la pr\u00e9cision du test visuel C.A.S.A. Vision et de la grille d\u2019amsler dans la d\u00e9g\u00e9n\u00e9rescence maculaire li\u00e9e \u00e0 l’\u00e2ge.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Razek Georges Coussa1<\/sup>, Cyril Archambault1<\/sup>, David E. Lederer 1<\/sup><\/strong><\/p>

1 <\/sup>D\u00e9partement d’ophtalmologie, Centre universitaire de sant\u00e9 McGill, Montr\u00e9al, Qu\u00e9bec, Canada\u00a0<\/p>

Financement: D.E.L. est consultant pour Alcon Inc., Bayer Inc. et Novartis Pharmaceuticals Inc.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Article clinique<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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*En anglais seulement<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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A New Way to Detect AMD<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The principles of chromatic aberration can help you detect changes in your patients’ vision.<\/p>

By Dominic Cianciullo, O.D.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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November 1, 2005 – Optometric Management Magazine<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tCliquez ici pour l'article original\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t<\/a>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The Casa Vision Screener is a tri-colored eye chart designed to detect physiologic or pathological changes in vision using the principles of chromatic aberration. It’s comprised of a chart that\u00a0displays black letters in 20\/40 type (the minimum requirement for driving in most states) against a colored background in red, green and yellow, each of which are refracted differently in the eye.<\/p>

The screener is useful for diagnosing several patient groups. Older presbyopic patients will see the yellow wavelength more clearly, even with hypermetropia. Myopic shifts often associated with\u00a0cataract formation and diabetes will result in better vision against the red background.<\/p>

The patient sits ten feet from the chart, with his or her spectacle prescription in place and observes how clear his or her vision is in each colored section. Clarity in one color, with respect to the\u00a0others, relays information about the visual state of the patient. Hyperopic patients experience better vision in the green part of the chart and myopic patients in the red section. Clearer vision in the\u00a0yellow section of the chart indicates a patient has some form of astigmatism, whether mixed, hyperopic or myopic.<\/p>

It is interesting to note that color vision anomalies do not affect the results of the screener. In clinical studies, we also noted that squinting of the eyes (pin-hole effect) cannot \u00ab\u00a0override\u00a0\u00bb the effect of\u00a0chromatic aberration. Although squinting will improve a patient’s vision, the relative clarity of one color in reference to another is the same.<\/p>

AMD screening<\/strong><\/p>

In our clinical studies, we have noted a hyperopic shift in patients who are in the early stage of wet AMD. This hyperopic shift is characteristic of a shallow elevation of the sensory retina at the\u00a0macula. The amount of hypermetropia in early stage, wet AMD is usually in the range of +1.00D. These patients will see the green wave length more clearly when tested with the screener. (The\u00a0patient must be wearing his or her distance prescription.)<\/p>

Metamorphopsia can also occur in the early stage of dry or wet AMD. Distortions and scotomas can easily be detected with the Amsler grid. However, you can’t guarantee patients will comply with\u00a0using the Amsler grid at home. The absence of metamorphopsia does not necessarily rule out the presence of AMD. Many patients with early AMD have reported experiencing no distortion.<\/p>

Patients can use the screener at home on their personal computers. Consider having patients who are at increased risk for wet AMD monitor vision at home as well. Systemic hypertension is a high\u00a0risk factor for the conversion of dry to wet AMD. Even those with the dry form of AMD should be regularly performing this test because a percentage of these cases will go on to develop the wet\u00a0form.<\/p>

Take it home<\/strong><\/p>

The screener can help you build your practice as well. My associate and I have noticed an increase in patient referrals since we placed the poster-version of the screener in the waiting areas of our\u00a0respective offices, through a project sponsored by Johnson & Johnson Vision Care.<\/p>

When we diagnose patients with early stage AMD, we advise them to self-test with the screener on a weekly basis. The in-office poster helps emphasize the message during their office visit. We\u00a0direct them to the website, www.casa-vision.com, which provides an online version of the test. We strongly advise they report to us immediately if they begin to see clearer vision in the green\u00a0section. Quick referral to a retinal specialist after the hyperopic shift is detected can help prevent choroidal neovascular membrane formation.<\/p>

Laser photocoagulation and photodynamic therapy are useful tools in the war on AMD. Current treatments for wet AMD cannot regain lost vision. Several other new treatments and drugs are under\u00a0investigation and may be available in the near future. In the meantime, however, it’s essential O.D.s detect patients with wet AMD early in the disease process to preserve as much remaining vision\u00a0as possible.<\/p>

The Casa Vision screener is a quick, easy and simple way for patients to test themselves and detect changes in vision that are often associated with the early stages of AMD. Regular testing may\u00a0help prevent serious vision loss.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

\u00c9tudes \u00c9tude scientifique *En anglais seulement Comparaison de la pr\u00e9cision du test visuel C.A.S.A. Vision et de la grille d\u2019amsler dans la d\u00e9g\u00e9n\u00e9rescence maculaire li\u00e9e \u00e0 l’\u00e2ge. Razek Georges Coussa1, Cyril Archambault1, David E. Lederer 1 1 D\u00e9partement d’ophtalmologie, Centre universitaire de sant\u00e9 McGill, Montr\u00e9al, Qu\u00e9bec, Canada\u00a0 Financement: D.E.L. est consultant pour Alcon Inc., Bayer […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1096","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/pages\/1096","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/comments?post=1096"}],"version-history":[{"count":20,"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/pages\/1096\/revisions"}],"predecessor-version":[{"id":1419,"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/pages\/1096\/revisions\/1419"}],"wp:attachment":[{"href":"https:\/\/casa-vision.com\/fr\/wp-json\/wp\/v2\/media?parent=1096"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}