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Screening for Studies on Nystagmus and Strabismus

This study has been completed.
Information provided by:
National Institutes of Health Clinical Center (CC) Identifier:
First received: November 3, 1999
Last updated: June 30, 2017
Last verified: December 10, 2007

This screening protocol is designed to help recruitment patients for National Eye Institute (NEI) studies on nystagmus and strabismus. Patients must meet specific requirements of a research study, and this protocol serves as a first step for admitting patients to an appropriate program.

Candidates will undergo a medical history, physical examination, eye examination and blood test. The eye examination includes measurement of eye pressure and dilation of the pupils to fully examine the lens, vitreous and retina. Specialized tests will be done only if needed to determine eligibility for a nystagmus or strabismus study. These include routine laboratory tests, non-invasive imaging, questionnaires, and other standard tests. If needed, a test called oculography may be done to record eye movements. There are two procedures for recording and documenting these movements. In the infrared system, the patient wears a pair of glasses or goggles and looks at a red light while the head is kept steady. In the search coil system, the eye is numbed with anesthetic eye drops and a soft contact lens is placed on the eye. Then the patient looks at a red light while the head is held still. Each oculography session lasts 20 to 30 minutes. Photographs of the eye may be taken.

When the screening is completed, patients will be informed of their options to participate in a study. Patients who are ineligible for a current study will be informed of alternative treatments or options. No treatment is offered under this protocol.

Nystagmus Strabismus

Study Type: Observational
Official Title: Screening Study for the Evaluation and Diagnosis of Potential Research Subjects With Nystagmus or Strabismus

Resource links provided by NLM:

Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 1500
Study Start Date: January 29, 1999
Estimated Study Completion Date: December 10, 2007
Detailed Description:

This protocol is designed for the screening of patients with either diagnosed or undiagnosed conditions, and serves as a first step for individuals who may be eligible and wish to participate in National Eye Institute (NEI) clinical research studies.

Each individual will be thoroughly evaluated during the screening process to determine if they are suitable candidates for inclusion in any of the NEI ongoing studies. The screening evaluation will include past and current medical histories, and an appropriate physical examination. Other routine diagnostic procedures and tests may also be completed in order to help determine a subject's eligibility. These tests and procedures are of minimal risk. Once the screening process is completed and their eligibility assessed, the subjects will be informed of their options to participate in one or more of the current clinical research studies. If no appropriate protocol is identified, recommendations for other treatment options may be given to the individual, their primary doctor or referring physician.


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion and exclusion criteria vary with the particular protocol for which a patient is being screened.

In addition to those diagnoses currently under study, subjects with unusual, interesting, or unknown conditions that require the establishment of a diagnosis may be eligible for inclusion in this study.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00001861

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Eye Institute (NEI)
  More Information

Publications: Identifier: NCT00001861     History of Changes
Other Study ID Numbers: 990035
Study First Received: November 3, 1999
Last Updated: June 30, 2017

Keywords provided by National Institutes of Health Clinical Center (CC):
Eye Movements
Lazy Eye
Eye Development
Screening Protocol
Eye Movement Disorders

Additional relevant MeSH terms:
Nystagmus, Pathologic
Ocular Motility Disorders
Cranial Nerve Diseases
Nervous System Diseases
Eye Diseases processed this record on August 18, 2017