--- title: Why does OPTOVERA use an individual baseline? description: Pupil responses differ between people. OPTOVERA uses each User’s individual baseline to compare Scans with that person’s expected response. --- [Skip to content](https://knowledge.sobereye.com/en/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind#main-content) - [English](https://knowledge.sobereye.com/en/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) - [Español](https://knowledge.sobereye.com/es/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) - [Italiano](https://knowledge.sobereye.com/it/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) - [Português - Brasil](https://knowledge.sobereye.com/pt-br/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) English Show submenu for translations ![](https://knowledge.sobereye.com/hs-fs/hubfs/00%20MKT%20material/Logo_blu_optovera.png?width=904&height=186&name=Logo_blu_optovera.png) - Home - Products - Pricing - Blog - Company Open main navigation Close main navigation - Home - Products - Pricing - Blog - Company - - [English](https://knowledge.sobereye.com/en/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) - [Español](https://knowledge.sobereye.com/es/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) - [Italiano](https://knowledge.sobereye.com/it/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) - [Português - Brasil](https://knowledge.sobereye.com/pt-br/piloto-optovera-users-enrollment-and-baseline-q6-por-que-optovera-utiliza-una-baseline-ind) English Show submenu for translations - Contact us Contact us How can we help you? - There are no suggestions because the search field is empty. 1. [Optovera Knowledge base (en)](https://knowledge.sobereye.com/en?hsLang=en) 2. [Users, Enrollment, and Baseline](https://knowledge.sobereye.com/en/users-enrollment-and-baseline?hsLang=en) # Why does OPTOVERA use an individual baseline? ## Individual baselines account for differences in pupillary response between people. OPTOVERA uses an individual baseline because pupillary response varies from person to person. Each User has their own normal pupillary response pattern. For this reason, OPTOVERA does not rely only on a generic reference value or compare the User against a general population average. Instead, it builds a personalized baseline for each User and compares future Scans with that User’s own expected response profile. This makes the comparison specific to the User being tested. It allows OPTOVERA to identify whether the User’s current pupillary response is consistent with their normal pattern or shows a significant alteration compared with their own baseline. Baseline acquisition usually takes approximately two weeks and requires at least 10 successful measurements collected across normal working shifts. During this period, the system is in learning mode. Users do not receive conclusive Scan results; they receive confirmation that the Scan was completed correctly and accepted for baseline acquisition. This phase also helps Users become comfortable with the test. By the time baseline acquisition is complete, Users have performed the Scan multiple times, learned the correct technique, and are generally able to complete it more quickly and consistently. After the initial baseline is complete, every Scan produces a result compared with that User’s own baseline: Within Baseline Range or Alteration Detected. 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