CataractNCT00078299
Evaluation of the Age-Related Eye Disease Study (AREDS) Clinical Lens Grading System
An observational study of Cataract, run by National Eye Institute (NEI) at 1 site in United States.
Trial summary
This study will evaluate a system developed to grade the severity of age-related cataract, a common cause of vision loss in older adults. Cataract research requires methods to simply and accurately determine the type and severity of cataracts in order to develop new, possibly non-surgical, treatments. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Cataract
- How many people
- 150 participants
- Where
- 1 siteUnited States
- Study dates
- Feb 2004to Apr 2005
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Who may be able to join
- Patient must understand and sign the informed consent.
- Patient must be at least 18 years of age.
- Pupillary dilation to at least 6 mm must be possible.
- Patients must have at least one natural lens present.
Who cannot join
- Patients below the age of 18 will be excluded from participation in this study of age-related cataract.
- 1. Any condition such as corneal opacification that precludes adequate slit lamp examination and photography of the lens.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Eye Institute (NEI)
Bethesda, Maryland, 20892
About this study
This study will evaluate a system developed to grade the severity of age-related cataract, a common cause of vision loss in older adults. Cataract research requires methods to simply and accurately determine the type and severity of cataracts in order to develop new, possibly non-surgical, treatments.
Patients 50 years of age and older with one of the three major age-related cataract types (nuclear, cortical, and posterior subcapsular) may be eligible for this study. Participants will be recruited from among patients enrolled in other National Eye Institute protocols.
Participants will have their eyes examined independently by two ophthalmologists with a biomicroscope, a magnifying device routinely used during eye examinations. The doctors will use the new grading system to record if a cataract is present, and if so, how severe it is. The examination includes measurement of visual acuity (vision chart test) and examination of the lens, retina, pupils and eye movements. Photographs of the eye will be taken using a special camera that flashes a bright light in the eye.
Read the detailed description
Standardized lens photography with centralized grading of photographs has been used in clinical trials and epidemiologic studies of cataract. While photographic grading systems have been shown to be reliable, they are too expensive and complex to use in many studies. For some large studies, especially those with many centers or those in which lens changes are of secondary concern, it would be useful to have a simple clinical lens grading system that is reliable and that can be used with minimal training of examiners. Several clinical lens grading systems have been developed and found to be reliable in the hands of dedicated lens researchers, but the systems have been difficult for other ophthalmologists to use reliably.
The Age-Related Eye Disease Study (AREDA) has developed a simplified clinical cataract grading system to assess the severity of nuclear, cortical and posterior subcapsular cataracts, the 3 main types of age-related cataract. The system is designed to require minimal examiner training for persons already proficient in the use of the slit lamp. A total 150 participants with cataracts of varying severity, who are already participating in other NEI protocols, will be recruited to evaluate the reliability of the system. After being dilated, each participant will have a lens grading performed independently by 2 examiners. To provide information on the validity of the clinical gradings, lens photographs will be taken and graded using the detailed AREDS system for grading photographs. The data will allow us to evaluate (1) the agreement between the AREDS clinical lens grading system and the AREDS photographic system of grading lens opacities, and (2) the agreement on assessment of cataract severity among opthalmologists (with varying subspecialty) using the AREDS clinical lens grading method.
- Conditions
- Cataract
- Keywords
- Cortical, Nuclear Sclerosis, Posterior Subcapsular, Photographic Methods, Reproducibility (intra and interobserver), Cataract, Agreement, Grading System
- Medical subject headings
- Cataract
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Feb 2004 (estimated)
- Study startFeb 2004
- Study completionApr 2005
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for CataractStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Enrolment
- 150 participants
Sponsor and investigators
- Lead sponsor
- National Eye Institute (NEI)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00078299
- Sponsor's protocol ID
- 040128
- Other IDs
- 04-EI-0128
- Status last verified
- Apr 2005
- First submitted
- 20 Feb 2004
- Last updated
- 4 Mar 2008
- Results posted
- No
Publications
Steinberg EP, Javitt JC, Sharkey PD, Zuckerman A, Legro MW, Anderson GF, Bass EB, O'Day D. The content and cost of cataract surgery. Arch Ophthalmol. 1993 Aug;111(8):1041-9. doi: 10.1001/archopht.1993.01090080037016.
PubMed 8352686Age-Related Eye Disease Study Research Group. The age-related eye disease study (AREDS) system for classifying cataracts from photographs: AREDS report no. 4. Am J Ophthalmol. 2001 Feb;131(2):167-75. doi: 10.1016/s0002-9394(00)00732-7.
PubMed 11228291Chylack LT Jr, Leske MC, McCarthy D, Khu P, Kashiwagi T, Sperduto R. Lens opacities classification system II (LOCS II). Arch Ophthalmol. 1989 Jul;107(7):991-7. doi: 10.1001/archopht.1989.01070020053028.
PubMed 2751471
Study at a glance
From the registry record, last updated by the sponsor on 4 Mar 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of the Age-Related Eye Disease Study (AREDS) Clinical Lens Grading System
- ClinicalTrials.gov ID
- NCT00078299
- Acronym / sponsor ID
- 040128
- Conditions
- Cataract
- Keywords
- Cortical, Nuclear Sclerosis, Posterior Subcapsular, Photographic Methods, Reproducibility (intra and interobserver), Cataract, Agreement, Grading System
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 150 participants
- Lead sponsor
- National Eye Institute (NEI)US National Institutes of Health
- Study start
- Feb 2004
- Study completion
- Apr 2005
- First posted
- 23 Feb 2004 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will evaluate a system developed to grade the severity of age-related cataract, a common cause of vision loss in older adults. Cataract research requires methods to simply and accurately determine the type and severity of cataracts in order to develop new, possibly non-surgical, treatments.
Patients 50 years of age and older with one of the three major age-related cataract types (nuclear, cortical, and posterior subcapsular) may be eligible for this study. Participants will be recruited from among patients enrolled in other National Eye Institute protocols.
Participants will have their eyes examined independently by two ophthalmologists with a biomicroscope, a magnifying device routinely used during eye examinations. The doctors will use the new grading system to record if a cataract is present, and if so, how severe it is. The examination includes measurement of visual acuity (vision chart test) and examination of the lens, retina, pupils and eye movements. Photographs of the eye will be taken using a special camera that flashes a bright light in the eye.
Detailed description
Standardized lens photography with centralized grading of photographs has been used in clinical trials and epidemiologic studies of cataract. While photographic grading systems have been shown to be reliable, they are too expensive and complex to use in many studies. For some large studies, especially those with many centers or those in which lens changes are of secondary concern, it would be useful to have a simple clinical lens grading system that is reliable and that can be used with minimal training of examiners. Several clinical lens grading systems have been developed and found to be reliable in the hands of dedicated lens researchers, but the systems have been difficult for other ophthalmologists to use reliably.
The Age-Related Eye Disease Study (AREDA) has developed a simplified clinical cataract grading system to assess the severity of nuclear, cortical and posterior subcapsular cataracts, the 3 main types of age-related cataract. The system is designed to require minimal examiner training for persons already proficient in the use of the slit lamp. A total 150 participants with cataracts of varying severity, who are already participating in other NEI protocols, will be recruited to evaluate the reliability of the system. After being dilated, each participant will have a lens grading performed independently by 2 examiners. To provide information on the validity of the clinical gradings, lens photographs will be taken and graded using the detailed AREDS system for grading photographs. The data will allow us to evaluate (1) the agreement between the AREDS clinical lens grading system and the AREDS photographic system of grading lens opacities, and (2) the agreement on assessment of cataract severity among opthalmologists (with varying subspecialty) using the AREDS clinical lens grading method.
Study design
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (4 listed)
- Patient must understand and sign the informed consent.
- Patient must be at least 18 years of age.
- Pupillary dilation to at least 6 mm must be possible.
- Patients must have at least one natural lens present.
Key exclusion criteria (2 listed)
- Patients below the age of 18 will be excluded from participation in this study of age-related cataract.
- 1. Any condition such as corneal opacification that precludes adequate slit lamp examination and photography of the lens.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Mar 2008.
- Background: PubMed 8352686Steinberg EP, Javitt JC, Sharkey PD, Zuckerman A, Legro MW, Anderson GF, Bass EB, O'Day D. The content and cost of cataract surgery. Arch Ophthalmol. 1993 Aug;111(8):1041-9. doi: 10.1001/archopht.1993.01090080037016.
- Background: PubMed 11228291Age-Related Eye Disease Study Research Group. The age-related eye disease study (AREDS) system for classifying cataracts from photographs: AREDS report no. 4. Am J Ophthalmol. 2001 Feb;131(2):167-75. doi: 10.1016/s0002-9394(00)00732-7.
- Background: PubMed 2751471Chylack LT Jr, Leske MC, McCarthy D, Khu P, Kashiwagi T, Sperduto R. Lens opacities classification system II (LOCS II). Arch Ophthalmol. 1989 Jul;107(7):991-7. doi: 10.1001/archopht.1989.01070020053028.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Cataract, run by National Eye Institute (NEI) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Mar 2008. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00078299, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Mar 2008.