{"product_id":"lux-meter","title":"Calibrated Dual-Range Light Meter (Lux and Foot-Candles)","description":"\u003ch4 data-end=\"112\" data-start=\"44\" data-section-id=\"196h1e4\"\u003eCalibrated Light Meter - An Exam Lane Essential for BCVA Testing\u003c\/h4\u003e\n\u003cp data-end=\"483\" data-start=\"114\"\u003e\u003cstrong data-end=\"153\" data-start=\"114\"\u003eBest‑Corrected Visual Acuity (\u003ca href=\"\/products\/etdrs-clinical-trial-kit\"\u003eBCVA\u003c\/a\u003e)\u003c\/strong\u003e using ETDRS® charts remains the \u003cstrong data-end=\"225\" data-start=\"186\"\u003eFDA‑endorsed gold‑standard endpoint\u003c\/strong\u003e in ophthalmic clinical trials, as reaffirmed during the NEI‑FDA Ophthalmic Clinical Trial Design consensus and subsequent regulatory guidance. \u003cspan class=\"relative -mx-px my-\u0026lt;-0.2rem\u0026gt; rounded px-px py-\u0026lt;0.2rem\u0026gt; transition-colors duration-100 ease-in-out\"\u003eThe National Eye Institute (NEI) and the FDA emphasize standardized testing protocols, including chart design, testing distance, and critically \u003cstrong data-is-last-node=\"\" data-end=\"168\" data-start=\"144\"\u003eambient illumination\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp data-end=\"780\" data-start=\"485\"\u003e\u003cstrong data-end=\"522\" data-start=\"485\"\u003eWhy light standardization matters\u003c\/strong\u003e: Even modest deviations from the specified luminance range (\u003cspan style=\"color: rgb(244, 6, 18);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(244, 6, 18);\" href=\"\/blogs\/resources\/what-is-etdrs\" target=\"_blank\"\u003e160 cd\/m², aligned with ETDRS protocol requirements\u003c\/a\u003e\u003c\/span\u003e) can introduce variability in BCVA scores and undermine comparability across clinical sites. \u003cspan class=\"relative -mx-px my-\u0026lt;-0.2rem\u0026gt; rounded px-px py-\u0026lt;0.2rem\u0026gt; transition-colors duration-100 ease-in-out\"\u003eTo meet the strict requirements set forth by entities such as NIH\/NEI and the FDA, and to comply with quality standards sponsors can count on the Precision Vision Lux Light Meter just just for BCVA assessments but also for contrast sensitivity tests like the Pelli-Robson, \u003ca href=\"\/products\/mars-contrast-sensitivity-test\/\"\u003eMars\u003c\/a\u003e, and \u003ca href=\"\/products\/apex-2-5-contrast-sensitivity-test\"\u003eAPEX\u003c\/a\u003e.\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 data-end=\"437\" data-start=\"121\"\u003eDual-Range Light Meter\u003c\/h4\u003e\n\u003cp\u003eDual-Range Meter reads both lux and foot-candles on a large 1\/2-inch-high display. An analog output of 0.1 millivolt per digit allows readings to be captured by a recorder. Precision selenium photovoltaic cells and microprocessor provide for a fast-response sampling rate of 0.4 seconds and an automatic zero adjustment. Display update rate may be set to 1 or 2 seconds.\u003c\/p\u003e\n\u003ch4\u003eTraceable\u003csup\u003e®\u003c\/sup\u003e Certificate\u003c\/h4\u003e\n\u003cp\u003eAn individually-numbered Traceable® Certificate provided with each unit, assures accuracy from our calibration laboratory accredited by \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.a2la.org\/genweb\/about.cfm\" target=\"_blank\"\u003eA2LA\u003c\/a\u003e. It indicates traceability of measurements to the SI units through \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.nist.gov\/about-nist\" target=\"_blank\"\u003eNIST\u003c\/a\u003e or other recognized national measurement institutes that are signatories to the CIPM Mutual Recognition Agreement.\u003c\/p\u003e\n\u003ch4\u003eMonitor and store results\u003c\/h4\u003e\n\u003cp\u003eDATA HOLD button freezes the display to capture readings. Precise photodiode and color-correction filter provide cosine- and color-corrected measurements. Unit is supplied with 2 inch diameter photocell, 40-inch cable, Traceable\u003csup\u003e®\u003c\/sup\u003e Certificate, 9-volt alkaline battery, and recorder output.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eDual-Range Meter measures lux in three ranges:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0 to 1999\u003c\/strong\u003e (1 lux resolution)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2000 to 19,990\u003c\/strong\u003e (10 lux resolution)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20,000 to 50,000\u003c\/strong\u003e (100 lux resolution)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eReadings in Foot-Candles (Fc):\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0 to 199.9\u003c\/strong\u003e (0.1 Fc resolution)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e200 to 1999\u003c\/strong\u003e (1 Fc resolution)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2000 to 5000\u003c\/strong\u003e (10 Fc resolution)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMeasures:\u003c\/strong\u003e 6-1\/2\" x 3\" x 1-1\/2\" Inches (16.51 x 7.62 x 3.81 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.625 Pounds (.28 Kg)\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eMade in the USA \u0026amp; CE Marked\u003c\/strong\u003e\u003c\/h5\u003e\n\u003ch5\u003e\u003ciframe height=\"100%\" width=\"100%\" src=\"https:\/\/player.vimeo.com\/video\/1121268995?badge=0\u0026amp;autopause=0\u0026amp;player_id=0\u0026amp;app_id=58479\u0026amp;muted=1\" title=\"Calibrated Dual-Range Light Meter (Lux and Foot-Candles) - Precision Vision\" loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/h5\u003e","brand":"Precision Vision","offers":[{"title":"Default Title","offer_id":45921492959393,"sku":"Lux","price":199.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0718\/4321\/7569\/files\/3251.jpg?v=1776157170","url":"https:\/\/precision-vision.com\/products\/lux-meter","provider":"Precision Vision","version":"1.0","type":"link"}