Visual Field Testing for Glaucoma

Phase-Based Progress Estimates
1
Effectiveness
1
Safety
Victoria General Hopsital - Nova Scotia Health Authority, Halifax, Canada
Glaucoma
Visual Field Testing - DiagnosticTest
Eligibility
18+
All Sexes
Eligible conditions
Select

Study Summary

This study is evaluating whether a head-mounted device can be used to test visual fields.

See full description

Treatment Effectiveness

Effectiveness Estimate

1 of 3

Study Objectives

This trial is evaluating whether Visual Field Testing will improve 1 primary outcome and 1 secondary outcome in patients with Glaucoma. Measurement will happen over the course of 5 weeks.

5 weeks
Reproducibility of sensitivity values
Visual field differential light sensitivity

Trial Safety

Trial Design

1 Treatment Group

Single Arm
1 of 1
Experimental Treatment

This trial requires 120 total participants across 1 different treatment group

This trial involves a single treatment. Visual Field Testing is the primary treatment being studied. Participants will all receive the same treatment. There is no placebo group. The treatments being tested are not being studied for commercial purposes.

Single Arm
DiagnosticTest
Patients will perform visual field testing with the Humphrey Visual Field Analyzer and with the custom head-mounted device.

Trial Logistics

Trial Timeline

Approximate Timeline
Screening: ~3 weeks
Treatment: Varies
Reporting: 5 weeks
This trial has the following approximate timeline: 3 weeks for initial screening, variable treatment timelines, and roughly 5 weeks for reporting.

Closest Location

Victoria General Hopsital - Nova Scotia Health Authority - Halifax, Canada

Eligibility Criteria

This trial is for patients born any sex aged 18 and older. There are 2 eligibility criteria to participate in this trial as listed below.

Mark “yes” if the following statements are true for you:
The Humphrey Field Analyzer showed that my visual field was normal, that I had early glaucomatous field damage, moderate glaucomatous field damage, or advanced glaucomatous field damage. show original
The ability to understand and consent to the study is important. show original

Patient Q&A Section

What is glaucoma?

"Glaucoma is a group of common eye diseases that can cause blindness and a reduced quality of life. Glaucoma is the second leading cause of vision loss worldwide. Glaucoma can cause blindness due to the increase of intraocular pressure (increased fluid pressure within the eye), or for other causes that cause a decrease of blood circulation to the eye or other damage to the optic nerve. Glaucoma can cause permanent damage to the optic nerve. Glaucoma can cause pain due to damage to vision (blindness) or to eye mobility." - Anonymous Online Contributor

Unverified Answer

Can glaucoma be cured?

"According to the above statistics the disease is still unsolved but can be cured in cases (a) where the optic nerve is damaged (retinal detachment with detachment of the iris) and (b) without optic nerve damage where there are systemic and local factors, such as hypertension or diabetes, which contribute to the development of the disease. In the latter scenario in many people, there is a decline in their visual function. However, it is not a disease of a single eye but of both which can be prevented when a person has two eyes.\n\nGlaucoma has two important types;Primary and Secondary Glaucoma." - Anonymous Online Contributor

Unverified Answer

How many people get glaucoma a year in the United States?

"About one in 200 is affected by glaucoma. Results from a recent clinical trial estimated age-adjusted prevalence in US adults of glaucoma at 5.9 per 1000, and estimated prevalence of all advanced stages at 18.6 per 1000." - Anonymous Online Contributor

Unverified Answer

What causes glaucoma?

"The cause of glaucoma is not fully understood but may be a combination of factors and gene interactions with environmental exposures. Understanding the mechanism of glaucoma gives support for new theories about its cause, and for effective management." - Anonymous Online Contributor

Unverified Answer

What are the signs of glaucoma?

"Visual field and visual processing tests are helpful in diagnosis of glaucoma. Visual field tests reveal loss of fixation points and loss of horizontal and vertical peripapillary rings. Visual processing tests reveal loss of colour discrimination, loss of contrast sensitivity, and loss of colour contrast between a blue field and a red background. In addition to routine testing, visual field tests are helpful to ensure that the patient has not been advised for surgery." - Anonymous Online Contributor

Unverified Answer

What are common treatments for glaucoma?

"These data underscore the need for increased attention to glaucoma and the importance of early detection for proper treatment. The need to enhance education and treatment of glaucoma and associated risk factors is indicated." - Anonymous Online Contributor

Unverified Answer

Have there been other clinical trials involving visual field testing?

"Findings from a recent study of this study show that MF testing is as sensitive as VF testing when performing screening for glaucoma as the detection rate of optic neuropathy/visual changes in the VF was higher than in the MF." - Anonymous Online Contributor

Unverified Answer

Does visual field testing improve quality of life for those with glaucoma?

"A VF test alone resulted in improvement in QoL. This improvement was greater than measured by a change in IOP. The VF test may be helpful to clinicians when considering the impact of their patients' glaucoma on their QoL." - Anonymous Online Contributor

Unverified Answer

What are the common side effects of visual field testing?

"While some common visual field tests may be associated with uncommon side effects there are no side effects with which they are highly correlated. Many of these side effects cannot be predicted prior to test interpretation. However, in select patients a pre-test risk stratification can enhance the benefit-risk ratio while minimizing negative effects." - Anonymous Online Contributor

Unverified Answer

Have there been any new discoveries for treating glaucoma?

"No new drugs are on the way to cure glaucoma and treat this disease. If you want to cure glaucoma and halt this progressive blindness, there is no treatment other than not having glaucoma.\n" - Anonymous Online Contributor

Unverified Answer

How does visual field testing work?

"The pattern and distribution analysis of the visual field has been shown to be useful in the detection and quantification of field defects before glaucoma-associated changes take place at the neurosensory level. Data from a recent study found high sensitivity and selectivity in the detection of field defects; the ability to distinguish between the normal and abnormal hemifields is crucial to the diagnosis of glaucoma. The pattern-reversal pattern has a particular value in this respect." - Anonymous Online Contributor

Unverified Answer

Is visual field testing safe for people?

"The majority of people who have been screened for glaucomatous visual field loss are willing to participate in visual field examination without being asked inappropriate demographic questions and are willing to have an examination performed if they wish." - Anonymous Online Contributor

Unverified Answer
Please Note: These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.
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