Evaluation of Onefit Scleral Lenses in the Mangement of Dry Eye

Inclusion Criteria: 1. Are at least 17 years of age and have full legal capacity to volunteer; 2. Have read and signed an information consent letter; 3. Are willing and able to follow instructions and maintain the appointment schedule; 4. Agree to wear the study scleral lenses for at least 8 hours per day, 5 days a week; 5. Have a refraction between +20.00 and -20.00D and spectacle astigmatism of no more than -3.00DC in each eye; 6. Have best corrected visual acuity of 20/40 or better in each eye with the study lenses; 7. Demonstrate an acceptable fit with the study lenses; 8. Have no active ocular disease or inflammation; 9. Group 1: Habitual wearer of frequent replacement or daily disposable soft lenses; 10. Group 2: Have not worn contact lenses for 6 months; 11. Group 1: Contact lens wearers should score ≥12 on CLDEQ-8; 12. Group 2: Non contact lens wearers should score ≥13 on OSDI. Exclusion Criteria: 1. Are participating in any concurrent clinical or research study, or have done so within the past 30 days; 2. Cannot achieve a successful lens fit or vision with the study lens; 3. Have been diagnosed with keratoconus or corneal distortion; 4. Have any known active\* ocular condition, disease and/or infection; 5. Have a systemic or ocular condition that in the opinion of the investigator may affect a study outcome variable e.g. pingueculae; 6. Are using any systemic or topical medications that in the opinion of the investigator may affect a study outcome variable; 7. Group 2: Non-contact lens wearers who score ≥33 on OSDI and also demonstrate either corneal staining ≥3 (Oxford scale) or non-invasive tear break-up time ≤3 seconds#; 8. Have known sensitivity to the diagnostic sodium fluorescein to be used in the study; 9. Are pregnant, lactating or planning a pregnancy\^ at the time of enrolment, by self report; 10. Have undergone refractive error surgery; 11. Are listed on the Delegation Log for this study.