{"id":75,"date":"2026-09-26T20:40:54","date_gmt":"2026-09-26T12:40:54","guid":{"rendered":"https:\/\/enochvision.com\/lens-testers\/"},"modified":"2026-09-26T22:43:16","modified_gmt":"2026-09-26T14:43:16","slug":"lens-testers","status":"publish","type":"page","link":"https:\/\/enochvision.com\/es\/lens-testers\/","title":{"rendered":"Lens Testers"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"75\" class=\"elementor elementor-75\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-81e74ef e-con-full e-flex e-con e-parent\" data-id=\"81e74ef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0ed9047 elementor-widget elementor-widget-html\" data-id=\"0ed9047\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"ev\"><div class=\"ev-wrap\"><nav class=\"ev-crumb\" aria-label=\"Breadcrumb\"><a href=\"\/\">Home<\/a><span aria-hidden=\"true\">\/<\/span><span aria-current=\"page\">Lens Testers<\/span><\/nav><section class=\"ev-cathead\"><div class=\"ev-cathead__main\"><span class=\"ev-eyebrow\">Measuring<\/span><h1 class=\"ev-h1\">Lens Testers for Optical Retail<\/h1><p class=\"ev-lead\">Counter testers that show customers what a lens does: UV blocking, blue-light and visible transmittance, and photochromic darkening.<\/p><\/div><div class=\"ev-cathead__side\"><p class=\"ev-small\">One transmittance meter and one demonstrator, for different jobs at the counter.<\/p><\/div><\/section><div class=\"ev-facts ev-facts--cat\"><div><span>Models<\/span><b>2<\/b><\/div><div><span>Types<\/span><b>Meter \u00b7 Demonstrator<\/b><\/div><div><span>Wavelengths<\/span><b>400 \/ 430 \/ 465 nm<\/b><\/div><div><span>Prices<\/span><b>Quoted per configuration<\/b><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8e25d9 elementor-widget elementor-widget-html\" data-id=\"e8e25d9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"ev\"><section class=\"ev-section \"><div class=\"ev-wrap\"><div class=\"ev-head2\"><div><span class=\"ev-eyebrow\">The range<\/span><h2 class=\"ev-h2\">Two lens testers<\/h2><\/div><\/div><div class=\"ev-models ev-models--2\"><article class=\"ev-model\"><a class=\"ev-model__img\" href=\"\/products\/cp-18b\/\"><span class=\"ev-model__tag\">Meter<\/span><span class=\"ev-model__no\">01<\/span><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18b-lens-transmittance-tester-uv-blue-light.jpg\" alt=\"CP-18B lens transmittance tester with detection head and color screen showing visible, UV400, blue 430 and blue 465 readings\" width=\"1536\" height=\"1024\" loading=\"lazy\" decoding=\"async\"><\/a><div class=\"ev-model__body\"><h3 class=\"ev-model__name\"><a href=\"\/products\/cp-18b\/\">CP-18B<\/a><\/h3><span class=\"ev-small\">Transmittance at 400, 430, 465 nm and visible.<\/span><dl class=\"ev-spec\"><div><dt>Measures<\/dt><dd>Transmittance<\/dd><\/div><div><dt>Wavelengths<\/dt><dd>400 \/ 430 \/ 465 nm, visible<\/dd><\/div><div><dt>Resolution<\/dt><dd>1%<\/dd><\/div><div><dt>Screen<\/dt><dd>4.0&quot; color LCD<\/dd><\/div><\/dl><div class=\"ev-model__btns\"><a class=\"ev-btn ev-btn--sm\" href=\"\/products\/cp-18b\/\">View details<\/a><a class=\"ev-btn ev-btn--sm ev-btn--ghost\" href=\"\/contact\/?model=CP-18B\">Ask about CP-18B<\/a><\/div><\/div><\/article><article class=\"ev-model\"><a class=\"ev-model__img\" href=\"\/products\/cp-18c\/\"><span class=\"ev-model__tag\">Demonstrator<\/span><span class=\"ev-model__no\">02<\/span><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2026\/09\/cp-18c-uv-photochromic-combined-tester.jpg\" alt=\"CP-18C UV and photochromic combined tester with two covered test positions and LED display\" width=\"900\" height=\"900\" loading=\"lazy\" decoding=\"async\"><\/a><div class=\"ev-model__body\"><h3 class=\"ev-model__name\"><a href=\"\/products\/cp-18c\/\">CP-18C<\/a><\/h3><span class=\"ev-small\">UV and photochromic lens tester for the counter.<\/span><dl class=\"ev-spec\"><div><dt>Shows<\/dt><dd>UV and photochromic<\/dd><\/div><div><dt>Power<\/dt><dd>10 W<\/dd><\/div><div><dt>Weight<\/dt><dd>0.9 kg<\/dd><\/div><div><dt>Size<\/dt><dd>236 \u00d7 157 \u00d7 57 mm<\/dd><\/div><\/dl><div class=\"ev-model__btns\"><a class=\"ev-btn ev-btn--sm\" href=\"\/products\/cp-18c\/\">View details<\/a><a class=\"ev-btn ev-btn--sm ev-btn--ghost\" href=\"\/contact\/?model=CP-18C\">Ask about CP-18C<\/a><\/div><\/div><\/article><\/div><\/div><\/section><section class=\"ev-section \" id=\"compare\"><div class=\"ev-wrap\"><div class=\"ev-head2\"><div><span class=\"ev-eyebrow\">Measure or demonstrate<\/span><h2 class=\"ev-h2\">Which tester do you need?<\/h2><\/div><div><p class=\"ev-small\">Many counters use both: the demonstrator to show the effect, the meter to back it with numbers.<\/p><\/div><\/div><div class=\"ev-tablewrap\"><table class=\"ev-table\"><thead><tr><th scope=\"col\"><\/th><th scope=\"col\">CP-18B<\/th><th scope=\"col\">CP-18C<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">What it gives you<\/th><td>Transmittance readings in %<\/td><td>A visual demonstration<\/td><\/tr><tr><th scope=\"row\">UV<\/th><td>Reading at 400 nm<\/td><td>UV blocking comparison<\/td><\/tr><tr><th scope=\"row\">Blue light<\/th><td>Readings at 430 nm and 465 nm<\/td><td><\/td><\/tr><tr><th scope=\"row\">Visible light<\/th><td>380\u2013760 nm<\/td><td><\/td><\/tr><tr><th scope=\"row\">Photochromic<\/th><td>Indicative only<\/td><td>Darkening under UV<\/td><\/tr><tr><th scope=\"row\">Power<\/th><td>DC 5 V \/ 2 A, optional battery<\/td><td>AC 220 V \/ 110 V, 10 W<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section><section class=\"ev-section \"><div class=\"ev-wrap\"><div class=\"ev-head2\"><div><span class=\"ev-eyebrow\">Background<\/span><h2 class=\"ev-h2\">Presenting lens performance honestly<\/h2><\/div><\/div><div class=\"ev-guide2\"><div class=\"ev-prose\"><h3>UV400<\/h3><p>Sources define UV400 differently, at 400 nm, 395 nm or 380 nm, and sunglass standards set their own limits. Quote the wavelength with the reading: \u201c0% transmittance at 400 nm\u201d is a claim you can defend.<\/p><h3>Photochromic lenses<\/h3><p>Darkening depends on UV, temperature and lens material. Car windshields block most UV, so most photochromics darken only slightly in the car. Tell customers before they find out.<\/p><\/div><div class=\"ev-prose\"><h3>Blue light<\/h3><p>Describe transmission, not health. A 2023 Cochrane review found blue-light filtering spectacles probably make no short-term difference to eye strain, and the UK College of Optometrists advises against promising less fatigue, better sleep or macular protection.<\/p><h3>Simple torches and pens<\/h3><p>A blue-light pen or UV torch shows a visible difference at its own wavelength. It does not measure how much light is blocked.<\/p><\/div><\/div><p class=\"ev-reading\">Background sources: <a href=\"https:\/\/www.2020mag.com\/article\/demonstrating-lenses\" target=\"_blank\" rel=\"noopener nofollow\">Demonstrating lenses (20\/20 Magazine)<\/a> \u00b7 <a href=\"https:\/\/www.cochranelibrary.com\/cdsr\/doi\/10.1002\/14651858.CD013244.pub2\/full\" target=\"_blank\" rel=\"noopener nofollow\">Blue-light filtering spectacles, Cochrane review 2023<\/a> \u00b7 <a href=\"https:\/\/www.college-optometrists.org\/news\/2023\/september\/review-of-blue-light-filtering-blocking-lenses\" target=\"_blank\" rel=\"noopener nofollow\">College of Optometrists on blue-light filtering lenses (2023)<\/a><\/p><\/div><\/section><section class=\"ev-section\" id=\"faq\"><div class=\"ev-wrap ev-faq\"><div style=\"display:flex;flex-direction:column;gap:14px\"><span class=\"ev-eyebrow\">Questions<\/span><h2 class=\"ev-h2\">Lens tester questions<\/h2><\/div><div class=\"ev-faq__list\"><details class=\"ev-faq__q\" open><summary><h3>Does a UV test prove a lens is UV400?<\/h3><\/summary><div><p>A demonstration shows that some UV is blocked. A meter such as the CP-18B gives a value at 400 nm; quote the wavelength with it.<\/p><\/div><\/details><details class=\"ev-faq__q\"><summary><h3>Can I tell customers blue-light lenses protect their eyes?<\/h3><\/summary><div><p>We advise against it. Show transmission figures and let the customer decide.<\/p><\/div><\/details><details class=\"ev-faq__q\"><summary><h3>Why do photochromic lenses not darken in the car?<\/h3><\/summary><div><p>The windshield blocks most of the UV that activates them.<\/p><\/div><\/details><details class=\"ev-faq__q\"><summary><h3>Do I need both testers?<\/h3><\/summary><div><p>Not necessarily. If you want numbers, start with the CP-18B; if you mainly sell photochromics, the CP-18C shows the effect best.<\/p><\/div><\/details><\/div><\/div><\/section><section class=\"ev-section ev-section--last\"><div class=\"ev-wrap\"><div class=\"ev-band\"><div><b>Planning a retail counter?<\/b><span class=\"ev-small\">Combine the testers with a PD meter, frame warmer and ultrasonic cleaner. See <a href=\"\/lab-packages\/#retail-counter\">Package C<\/a>.<\/span><\/div><a class=\"ev-btn\" href=\"\/contact\/\">Discuss your project&nbsp;&nbsp;\u2197<\/a><\/div><\/div><\/section><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/enochvision.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Lens Testers\", \"item\": \"https:\/\/enochvision.com\/lens-testers\/\"}]}<\/script><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Home\/Lens Testers Measuring Lens Testers for Optical Retail Counter testers that show customers what a lens does: UV blocking, blue-light and visible transmittance, and photochromic darkening. One transmittance meter and one demonstrator, for different jobs at the counter. Models2TypesMeter \u00b7 DemonstratorWavelengths400 \/ 430 \/ 465 nmPricesQuoted per configuration The range Two lens testers Meter01 CP-18B [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-75","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages\/75","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/comments?post=75"}],"version-history":[{"count":16,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages\/75\/revisions"}],"predecessor-version":[{"id":758,"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/pages\/75\/revisions\/758"}],"wp:attachment":[{"href":"https:\/\/enochvision.com\/es\/wp-json\/wp\/v2\/media?parent=75"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}