--- title: Optic Zone Customization and Assessment Tips description: Customize the assessment experience for patients with sphere or toric contact lenses experiences glare and halos due to large-sized pupils. image: https://blog.specialeyesqc.com/hubfs/Blog%20Banner%20-%20SPE%20(95).png --- Toric Design & Prescribing # Optic Zone Customization and Assessment Tips Customize the assessment experience for patients with sphere or toric contact lenses experiences glare and halos due to large-sized pupils. [ SpecialEyes ](https://blog.specialeyesqc.com/author/specialeyes) Feb 7, 2022 --- SpecialEyes custom soft contact lenses come standard with an 8.0mm optic zone. However, we can customize the optic zone up to 10mm in 0.5mm increments. This can prove helpful in situations where a patient with sphere or toric contact lenses experiences glare and halos due to large-sized pupils. You may request a larger optical zone when ordering your custom soft contact lenses, or contact a consultant at 866-822-2020 or [seconsult@bvimedical.com](mailto:seconsult@bvimedical.com) for further information. ### Use the following tips during assessments: 1. With the contact lenses on the eyes, occlude the unaffected eye. If experiencing glare and halos in both, occlude either eye. 2. Shine penlight into occluded eye in an attempt to shrink pupil and limit light in non-occluded eye. 3. While shining light into occluded eye, ask patient if glare symptoms have improved or resolved. If these symptoms have improved or resolved, then you may assume that increasing the optical zone of the contact lens will solve the glare and halo issue for your patient. ![Glare vs. Halo vs. Normal](https://blog.specialeyesqc.com/hs-fs/hubfs/optic%20zone.png?width=623&name=optic%20zone.png) ![](https://specialeyesqc.com/img/optical-zone-1.jpg?width=315&name=optical-zone-1.jpg) [Toric Design & Prescribing](https://blog.specialeyesqc.com/tag/design-and-prescribing) [Multifocal Design & Prescribing](https://blog.specialeyesqc.com/tag/multifocal-contact-lenses-design-prescribing) ## Similar posts Multifocal Design & Prescribing ### [Tips for Fitting the Custom SpecialEyes 54 Multifocal](https://blog.specialeyesqc.com/custom-toric-multifocal-contact-lenses-tips-for-fitting-the-specialeyes-54-multifocal) Tips on fitting the SpecialEyes 54 Multifocal. Custom aspheric multifocal contact lenses for the majority of presbyopic patients who experience... SpecialEyes Jul 28, 2014 Multifocal Design & Prescribing ### [SpecialEyes 54 Multifocal: Changing the Near Center Zone Size](https://blog.specialeyesqc.com/specialeyes-54-toric-multifocal-contact-lens-and-effects-of-a-near-center-zone-size-change) The 54 Multifocal Toric Contact Lens design from SpecialEyes enables practitioners to alter the near center zone size for enhanced visual results. SpecialEyes Aug 4, 2014 Multifocal Design & Prescribing ### [SpecialEyes 54 Toric Multifocal Contact Lens Indications](https://blog.specialeyesqc.com/specialeyes-54-toric-multifocal-contact-lens-indications) The 54 Toric Multifocal contact lens from SpecialEyes is indicated for a wide range of presbyopic patients, including those with astigmatism. SpecialEyes Jul 14, 2014 ### Get the latest updates from SpecialEyes Complete the form to get the latest news and updates.