Investigation of vision and subjective changes when alteringcylindrical power and axis in healthy adults with normal visio

Not Applicable

Completed

• Conditions: Astigmatism; Eye - Normal eye development and function

• Registration Number: ACTRN12616001526460
• Lead Sponsor: Brien Holden Vision Institute

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2016-11-07
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

Able to read and comprehend English and give informed consent as
demonstrated by signing a record of informed consent.
-Be at least 18 years old, male or female.
-Have at least 0.75D cylindrical power in at least one eye.
-Willing to comply with the 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 giving accurate visual acuity
data.

Exclusion Criteria

-Any pre-existing ocular irritation, injury or condition (including
infection or disease) of the cornea, conjunctiva or eyelids that would
affect visual acuity measurements.
-Any systemic disease that adversely affects ocular health e.g.
diabetes, Graves disease, and auto-immune diseases such as
ankylosing spondylitis, multiple sclerosis, Sjogrens 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 visual acuity either in an
adverse or beneficial manner at enrolment and/or during the clinical
trial.
-Eye surgery within 12 weeks immediately prior to enrolment for this
trial.
-Rigid gas permeable (RGP) or Orthokeratology lens wear within
previous 12 months
-Previous corneal refractive surgery.
-Currently enrolled in another clinical trial.
-Pregnancy.

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Change in visual acuity using an electronic letter chart at 6 metres[Within 5 minutes of changing the cylinder axis]

Secondary Outcome Measures

Name	Time	Method
Change in subjective vision clarity using a 1-10 numeric scale[Within 5 minutes of changing the cylinder axis];Change in subjective vision satisfaction using a 1-10 numeric scale[Within 5 minutes of changing the cylinder axis]