- ICH GCP
- US Clinical Trials Registry
- Klinisk utprøving NCT00007215
Dynamic Light Scattering Device (DLS) Study of Age-Related Changes in the Lens and Cataracts
A Study of Age-Related Changes in the Human Lens and Cataracts In Vivo Using Dynamic Light Scattering Device (DLS) Combined With Keratoscopy
This study will use a newly developed instrument called dynamic light scattering device (DLS) to examine age-related changes in the human lens and to study the causes and development of cataracts. DLS uses a low intensity laser light (similar to that used in supermarket checkouts) to measures lens cloudiness. It detects changes in the human lens at the earliest stages, when anti-cataract treatment would be most effective in reversing, delaying or preventing cataract formation.
Patients 18 years of age and older with cataracts and normal volunteers between the ages of 18 and 70 years may be eligible for this study. Participants will have a standard eye examination, including a vision check, pressure measurement, lens examination using DLS and examination of the retina. Photographs of the lens or retina, or both, may be taken.
This study does not involve treatment. No anti-cataract medications will be given.
Studieoversikt
Detaljert beskrivelse
Studietype
Registrering
Kontakter og plasseringer
Studiesteder
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Maryland
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Bethesda, Maryland, Forente stater, 20892
- National Eye Institute (NEI)
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Deltakelseskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Barn
- Voksen
- Eldre voksen
Tar imot friske frivillige
Kjønn som er kvalifisert for studier
Beskrivelse
INCLUSION:
Patients 18 years or older will be admitted to this study.
There will be no gender or sex bias in the recruitment.
Fifteen subjects (30 eyes) who are normal volunteers of either sex, 3 for each decade from 18-70, will be recruited.
These normal volunteers should have clear lenses with LOCS II clinical score for nuclear opalescence of 0.5 or less.
Three patients (18 eyes) for each major type of cataract (nuclear, cortical and PSC), will be recruited also for evaluation with the DLS device.
All 3 types of cataracts will be graded using the LOCS II system and will have a clinical score of at least one.
EXCLUSION:
Patients who have uveitis, glaucoma and who are thought to be at risk for an adverse reaction to pupil dilation, or have a history of allergic reaction to one of the dilating agents that will be used.
Studieplan
Hvordan er studiet utformet?
Samarbeidspartnere og etterforskere
Sponsor
Publikasjoner og nyttige lenker
Generelle publikasjoner
- Benedek GB, Chylack LT Jr, Libondi T, Magnante P, Pennett M. Quantitative detection of the molecular changes associated with early cataractogenesis in the living human lens using quasielastic light scattering. Curr Eye Res. 1987 Dec;6(12):1421-32. doi: 10.3109/02713688709044506.
- Bursell SE, Baker RS, Weiss JN, Haughton JF, Rand LI. Clinical photon correlation spectroscopy evaluation of human diabetic lenses. Exp Eye Res. 1989 Aug;49(2):241-58. doi: 10.1016/0014-4835(89)90094-8.
- Chylack 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.
Studierekorddatoer
Studer hoveddatoer
Studiestart
Studiet fullført
Datoer for studieregistrering
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Anslag)
Oppdateringer av studieposter
Sist oppdatering lagt ut (Anslag)
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Nøkkelord
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 010051
- 01-EI-0051
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