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In this dataset, we address this research gap by collecting data in a hybrid field-laboratory experiment (\n                    <jats:italic>N<\/jats:italic>\n                    \u2009=\u200983, 43 female, age range 18\u201387 years) using a custom-built, wearable, video-based eye tracker with a spectroradiometer measuring spectral irradiance in the approximate corneal plane, resulting in 29,664 valid\u00a0recorded spectral irradiance and eye image pairs along with 83 approximately 3-minute-long calibration videos. After an initial 3-minute calibration procedure, 10-minute dark-adaptation period and a 14-minute controlled laboratory light condition, participants moved in and between indoor and outdoor environments of varying spectral irradiance for ~25\u201335\u2009minutes and performed a range of everyday tasks. This dataset may provide a basis for developing algorithms for pupil detection, processing, and prediction under natural conditions.\n                  <\/jats:p>","DOI":"10.1038\/s41597-026-07816-w","type":"journal-article","created":{"date-parts":[[2026,7,25]],"date-time":"2026-07-25T09:21:52Z","timestamp":1784971312000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Joint infrared pupil images and near-corneal-plane spectral light exposure data under natural conditions"],"prefix":"10.1038","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7972-5634","authenticated-orcid":false,"given":"Rafael","family":"Lazar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8572-9268","authenticated-orcid":false,"given":"Manuel","family":"Spitschan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,25]]},"reference":[{"key":"7816_CR1","doi-asserted-by":"publisher","first-page":"563","DOI":"10.1038\/nrn1138","volume":"4","author":"KR Gegenfurtner","year":"2003","unstructured":"Gegenfurtner, K. 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