Accommodative Lag with Multifocal Contact Lenses

Not Applicable

Completed

• Conditions: Accommodative lag response; Eye - Normal eye development and function

• Registration Number: ACTRN12611001004954
• Lead Sponsor: Brien Holden Vision Institute

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2011-09-20
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

Able to read and comprehend English and give informed consent as demonstrated by signing a record of informed consent.
Be between the ages of 18 to 25 years of age, male or female.
Willing to comply with the wearing and clinical trial visit schedule as directed by the Investigator.
Have ocular health findings considered to be normal” and which would not prevent the participant from safely wearing contact lenses.
Have a contact lens prescription that is myopic between -1.00 and -4.00D (inclusive).
Have astigmatism that is not greater than -0.75DC and anisometropia between the two eyes of 1.00D or less.
Is correctable to at least 6/9 (20/30) or better in each eye with contact lenses.
Be an experienced and habitual contact lens wearer.
Be able to insert and remove contact lenses.

Exclusion Criteria

Any pre-existing ocular irritation, injury or condition (including infection or disease) of the cornea, conjunctiva or eyelids that would preclude contact lens fitting and safe wearing of contact lenses.
Any systemic disease that adversely affects ocular health e.g. diabetes, Graves disease, and auto immune diseases such as ankylosing spondylitis, multiple sclerosis, Sjögrens syndrome and systemic lupus erythematosus. Conditions such as systemic hypertension and arthritis do not automatically exclude prospective participants.
Use of or a need for concurrent category S3 and above ocular medication at enrolment and/or during the clinical trial.
Use of or a need for any systemic medication or topical medications which may alter normal ocular findings / are known to affect a participant’s ocular health / physiology or contact lens performance either in an adverse or beneficial manner at enrolment and/or during the clinical trial. NB: Systemic antihistamines are allowed on an as needed basis”, provided they are not used prophylactically during the trial and at least 24 hours before the clinical trial product is used.
Eye surgery within 12 weeks immediately prior to enrolment for this trial.
Previous corneal refractive surgery.
Contraindications to contact lens wear.
Known allergy or intolerance to ingredients in any of the clinical trial products.
Currently enrolled in another clinical trial.
Participation in a clinical trial within the previous 2 weeks for dispensing studies and 48 hours between in-house studies.
Pregnancy.

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
To compare the accommodative lag response and adaptation obtained with different contact lens designs.[Accommodative response measurements with a non-invasive novel peripheral refraction instrument will be carried out at all four visits of each stage (total 3 stages)]

Secondary Outcome Measures

Name	Time	Method
To compare subjective vision experience with different contact lens designs.<br>To compare the higher order aberration profiles obtained with different contact lens designs.<br>To compare peripheral refraction profiles with different contact lens designs.[Subjective vision/comfort questionnaire, aberration profile measures, and peripheral refraction will be carried out at all four visits of each stage (total 3 stages)]