{"id":29386,"date":"2025-11-20T13:25:02","date_gmt":"2025-11-20T13:25:02","guid":{"rendered":"https:\/\/www.oculus.de\/en\/?post_type=avada_faq&#038;p=29386"},"modified":"2025-11-20T13:25:02","modified_gmt":"2025-11-20T13:25:02","slug":"what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam","status":"publish","type":"avada_faq","link":"https:\/\/www.oculus.de\/en\/faq-items\/what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam\/","title":{"rendered":"What are the differences between all the power maps displayed by the Pentacam\u00ae?"},"content":{"rendered":"<p>Different corneal power maps are displayed by the Pentacam\u00ae::<\/p>\n<ul>\n<li>Sagittal and Tangential Power map<\/li>\n<li>Refractive Power map<\/li>\n<li>True Net Power map (TNP)<\/li>\n<li>Total Corneal Refractive Power map (TCRP)<\/li>\n<\/ul>\n<p>Pentacam\u00ae measures height (elevation) data. These are converted into curvature (mm) and then converted into power values (diopter).<\/p>\n<p>Different factors are taken into consideration to calculate the different power maps of the Pentacam\u00ae:<\/p>\n<ul>\n<li>The refractive effect (Snell\u2019s law of refraction)<\/li>\n<li>Inclusion of anterior\/posterior surfaces<\/li>\n<li>Correct refractive indices used<\/li>\n<li>Location of principle planes (Ray tracing)<\/li>\n<\/ul>\n<\/p>\n<div class=\"table-1\">\n<table width=\"100%\">\n<tbody>\n<tr>\n<td align=\"left\"><\/td>\n<td align=\"left\">Refractive effect<\/td>\n<td align=\"left\">Inclusion anterior\/posterior surface<\/td>\n<td align=\"left\">Correct refractive indices used<\/td>\n<td align=\"left\">Ray tracing<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">Sagittal map<\/td>\n<td align=\"left\"><\/td>\n<td align=\"left\"><\/td>\n<td align=\"left\"><\/td>\n<td align=\"left\"><\/td>\n<\/tr>\n<tr>\n<td align=\"left\">Refractive power map<\/td>\n<td align=\"left\">x<\/td>\n<td align=\"left\"><\/td>\n<td align=\"left\"><\/td>\n<td align=\"left\"><\/td>\n<\/tr>\n<tr>\n<td align=\"left\">TNP<\/td>\n<td align=\"left\"><\/td>\n<td align=\"left\">x<\/td>\n<td align=\"left\">x<\/td>\n<td align=\"left\"><\/td>\n<\/tr>\n<tr>\n<td align=\"left\">TCRP<\/td>\n<td align=\"left\">x<\/td>\n<td align=\"left\">x<\/td>\n<td align=\"left\">x<\/td>\n<td align=\"left\">x<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\n<p>Above table shows the factors used to calculate the different power maps.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Different corneal power maps are displayed by the Pentacam\u00ae:: Sagittal and Tangential Power map Refractive Power map True Net Power map (TNP) Total Corneal Refractive Power map (TCRP) Pentacam\u00ae measures height (elevation) data. These are converted into curvature (mm) and   &#8230;<\/p>\n","protected":false},"author":55,"featured_media":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"faq_category":[364,367],"class_list":["post-29386","avada_faq","type-avada_faq","status-publish","format-standard","hentry","faq_category-pentacam-for-all","faq_category-power-calculation"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What are the differences between all the power maps displayed by the Pentacam\u00ae? - OCULUS INT<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are the differences between all the power maps displayed by the Pentacam\u00ae? - OCULUS INT\" \/>\n<meta property=\"og:description\" content=\"Different corneal power maps are displayed by the Pentacam\u00ae:: Sagittal and Tangential Power map Refractive Power map True Net Power map (TNP) Total Corneal Refractive Power map (TCRP) Pentacam\u00ae measures height (elevation) data. These are converted into curvature (mm) and  ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.oculus.de\/en\/faq-items\/what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam\/\" \/>\n<meta property=\"og:site_name\" content=\"OCULUS INT\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/OCULUSinternational\/\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.oculus.de\/en\/wp-content\/uploads\/sites\/12\/2021\/01\/oculus-1024x193-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"193\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@OCULUSofficial\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/faq-items\\\/what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam\\\/\",\"url\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/faq-items\\\/what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam\\\/\",\"name\":\"What are the differences between all the power maps displayed by the Pentacam\u00ae? - OCULUS INT\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/#website\"},\"datePublished\":\"2025-11-20T13:25:02+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/faq-items\\\/what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam\\\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.oculus.de\\\/en\\\/faq-items\\\/what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/faq-items\\\/what-are-the-differences-between-all-the-power-maps-displayed-by-the-pentacam\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"FAQs\",\"item\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/faq-items\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"What are the differences between all the power maps displayed by the Pentacam\u00ae?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/\",\"name\":\"OCULUS Germany\",\"description\":\"OCULUS Germany\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/#organization\"},\"alternateName\":\"OCULUS Germany\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/#organization\",\"name\":\"OCULUS Germany\",\"alternateName\":\"OCULUS Optikger\u00e4te GmbH\",\"url\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/wp-content\\\/uploads\\\/sites\\\/12\\\/2021\\\/01\\\/oculus-1024x193-1.png\",\"contentUrl\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/wp-content\\\/uploads\\\/sites\\\/12\\\/2021\\\/01\\\/oculus-1024x193-1.png\",\"width\":1024,\"height\":193,\"caption\":\"OCULUS Germany\"},\"image\":{\"@id\":\"https:\\\/\\\/www.oculus.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/OCULUSinternational\\\/\",\"https:\\\/\\\/x.com\\\/OCULUSofficial\",\"https:\\\/\\\/www.instagram.com\\\/oculusinternational\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/oculus-optikgeraete-gmbh-int\\\/\",\"https:\\\/\\\/www.youtube.com\\\/user\\\/OculusGermany\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What are the differences between all the power maps displayed by the Pentacam\u00ae? - OCULUS INT","robots":{"index":"noindex","follow":"follow"},"og_locale":"en_GB","og_type":"article","og_title":"What are the differences between all the power maps displayed by the Pentacam\u00ae? - OCULUS INT","og_description":"Different corneal power maps are displayed by the Pentacam\u00ae:: Sagittal and Tangential Power map Refractive Power map True Net Power map (TNP) Total Corneal Refractive Power map (TCRP) Pentacam\u00ae measures height (elevation) data. 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