{"id":9389,"date":"2019-10-24T08:31:36","date_gmt":"2019-10-24T08:31:36","guid":{"rendered":"https:\/\/jurmed.ro\/medici\/?p=9389"},"modified":"2019-10-24T08:47:38","modified_gmt":"2019-10-24T08:47:38","slug":"de-ce-sa-optam-pentru-cristalinele-torice","status":"publish","type":"post","link":"https:\/\/jurmed.ro\/medici\/de-ce-sa-optam-pentru-cristalinele-torice\/","title":{"rendered":"De ce s\u0103 opt\u0103m pentru cristalinele torice?"},"content":{"rendered":"<p><a href=\"https:\/\/jurmed.ro\/medici\/wp-content\/uploads\/sites\/2\/2019\/10\/Gauss.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9390 alignleft\" src=\"https:\/\/jurmed.ro\/medici\/wp-content\/uploads\/sites\/2\/2019\/10\/Gauss-200x300.jpg\" alt=\"\" width=\"200\" height=\"300\" \/><\/a><\/p>\n<p><em>Autor:<\/em><\/p>\n<p style=\"text-align: justify\"><em><strong>Dr. Oana POSTOLACHE<\/strong><\/em><\/p>\n<p style=\"text-align: justify\"><em>Medic Primar Oftalmolog\u00a0 &#8211; Clinica Oftalmologic\u0103 Gauss, Bac\u0103u<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify\">\u00a028%din popula\u0163ie prezint\u0103 un astigmatism mai mare de o dioptrie.<\/p>\n<p style=\"text-align: justify\">47%\u00a0din totalul prescrip\u0163iilor de ochelari \u00een USA au cilindru mai mare de 0,75 D. Procentul de astigmatism miopic este de 2 ori mai mare dec\u00e2t procentul de astigmatism hipermetropic. Pacien\u0163ii cu implant cristalinian toric au o independen\u0163\u0103 de 70-100% fa\u0163\u0103 de ochelari comparativ cu 30-50% pentru ochii astigmici cu implant de cristalin non-toric.<\/p>\n<p style=\"text-align: justify\"><strong><u>Ar trebui corectat tot astigmatismul \u00een timpul opera\u021biei de cataract\u0103?<\/u><\/strong><\/p>\n<p style=\"text-align: justify\">Cristalinul toric se recomand\u0103 pentru astigmatism contrar regulei mai mare de 0,75 D sau pentru corectarea astigmatismului conform regulei mai mare de o dioptrie. Astigmatismele contrar regulei depind de inciziile verticale. Modific\u00e2nd pozi\u021bia axului va fi afectat\u0103 acuitatea vizual\u0103 \u0219i calitatea vie\u021bii pacientului.<\/p>\n<p style=\"text-align: justify\">Cristalinele torice se utilizeaz\u0103 at\u00e2t \u00een astigmatismele mari c\u00e2t \u0219i \u00een astigmatismele mici. Se admite maxim 0,5 D de astigmatism rezidual. Un astigmatism necorectat mai mare de 0,75 D duce la reducerea acuit\u0103\u021bii vizuale.<\/p>\n<p style=\"text-align: justify\">Preoperator se efectueaz\u0103 biometrie \u0219i topografie cornean\u0103. Nu se opteaz\u0103 pentru cristalin toric \u00een caz de astigmatism neregulat (keratoconus, cicatrici, pterigion) sau \u00een distrofia endotelial\u0103 Fuchs.<\/p>\n<p style=\"text-align: justify\">Astigmatismul cornean posterior scade astigmatismul cornean total pentru astigmatismul anterior conform regulei \u0219i cre\u0219te astigmatismul cornean total \u00een astigmatismul anterior contrar regulei. Dar astigmatismul cornean posterior este mai mare de 0,5 D doar \u00een 10% dintre cazuri.<\/p>\n<p style=\"text-align: justify\">\u00cen evaluarea preoperatorie se \u021bine cont \u0219i de astigmatismul indus chirurgical. Acesta se poate determina prin diferen\u021ba \u00eentre astigmatismul cornean postoperator (keratometric\/topografic) \u0219i astigmatismul cornean preoperator (keratometric\/topografic).<\/p>\n<p style=\"text-align: justify\">Acest parametru e apoi introdus \u00eentr-un formular online pentru calcularea pozi\u021biei cristalinului toric.<\/p>\n<p style=\"text-align: justify\">Preoperator se realizeaz\u0103 marcajul axului de plasare pentru cristalin. Pentru marcajul manual exist\u0103 mai multe sisteme: marcaj la lampa cu fant\u0103, marcaj cu pendulul, marcaj cu tonometrul.<\/p>\n<p style=\"text-align: justify\">De asemenea avem \u0219i suport digital pentru marcaj ce \u021bine cont de vasele de s\u00e2nge conjunctivale \u0219i caracteristicile irisului. Acesta ne ajut\u0103 \u0219i intraoperator pentru marcarea, pozi\u021bionarea \u0219i alinierea cristalinului toric. (Verion \u2013 Alcon, Callisto \u2013 Zeiss). Pentru sistemele de marcaj digital eroarea \u00een alinierea cristalinului toric e semnificativ mai mic\u0103 comparativ cu cele manuale. \u00cen cazul marcatoarelor manuale \u2013 eroarea variaz\u0103 \u00eentre 2-5 grade versus 1,3-3 grade pentru cele digitale.<\/p>\n<p style=\"text-align: justify\">Zece grade de eroare \u00een alinierea implantului toric duce la o reducere cu 33% a corec\u021biei astigmatismului. Rota\u021bia postoperatorie a cristalinelor torice e limitat\u0103 la 0,9 grade; de aceea e foarte important\u0103 alinierea corespunz\u0103toare a cristalinului intraoperator.<\/p>\n<p style=\"text-align: justify\">\u00cen concluzie cristalinele torice asigur\u0103 o acuitate vizual\u0103 necorectat\u0103 semnificativ mai bun\u0103, o reducere a astigmatismului rezidual \u0219i ofer\u0103 o independen\u021b\u0103 crescut\u0103 fa\u021b\u0103 de ochelari pentru vedere la distan\u021b\u0103.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Autor: Dr. Oana POSTOLACHE Medic Primar Oftalmolog\u00a0 &#8211; Clinica Oftalmologic\u0103 Gauss, Bac\u0103u &nbsp; &nbsp; &nbsp; &nbsp; \u00a028%din popula\u0163ie prezint\u0103 un astigmatism mai mare de o dioptrie. 47%\u00a0din totalul prescrip\u0163iilor de [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":9390,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[33,78],"tags":[],"class_list":["post-9389","post","type-post","status-publish","format-standard","has-post-thumbnail","category-articole","category-oftalmologie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>De ce s\u0103 opt\u0103m pentru cristalinele torice?<\/title>\n<meta name=\"description\" content=\"De ce s\u0103 opt\u0103m pentru cristalinele torice? 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