B I Gramatikov

Summary

Affiliation: Johns Hopkins University
Country: USA

Publications

  1. ncbi request reprint Birefringence-based eye fixation monitor with no moving parts
    B I Gramatikov
    Johns Hopkins University School of Medicine, Wilmer Ophthalmological Institute, The Krieger Children s Eye Center, Baltimore, Maryland 21287 9028, USA
    J Biomed Opt 11:34025. 2006
  2. doi request reprint New pediatric vision screener, part II: electronics, software, signal processing and validation
    Boris I Gramatikov
    Laboratory of Ophthalmic Instrument Development, The Krieger Children s Eye Center at the Wilmer Eye Institute, The Johns Hopkins University School of Medicine, 233, 600 N Wolfe Street, Baltimore, MD, 21287 9028, USA
    Biomed Eng Online 15:15. 2016
  3. doi request reprint Detection of central fixation using short-time autoregressive spectral estimation during retinal birefringence scanning
    Boris I Gramatikov
    Ophthalmic Optics Laboratory, Wilmer Eye Institute, The Johns Hopkins University School of Medicine, 600 N Wolfe St, Wilmer 233, Baltimore, MD 21287, United States Electronic address
    Med Eng Phys 37:905-10. 2015
  4. pmc Modern technologies for retinal scanning and imaging: an introduction for the biomedical engineer
    Boris I Gramatikov
    Laboratory of Ophthalmic Optics, Wilmer Eye Institute, Johns Hopkins University School of Medicine, 600 N, Wolfe St, Baltimore MD 21287, USA
    Biomed Eng Online 13:52. 2014
  5. doi request reprint A device for continuous monitoring of true central fixation based on foveal birefringence
    Boris Gramatikov
    Division of Pediatric Ophthalmology and Adult Strabismus, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Wilmer 233, 600 N Wolfe St, Baltimore, MD 21287, USA
    Ann Biomed Eng 41:1968-78. 2013
  6. pmc Detecting fixation on a target using time-frequency distributions of a retinal birefringence scanning signal
    Boris Gramatikov
    Laboratory of Ophthalmic Optics, Krieger Children s Eye Center, Pediatric Ophthalmology and Adult Strabismus, Wilmer Ophthalmological Institute, Johns Hopkins University School of Medicine, Rm 233, 600 N Wolfe St, Baltimore, Maryland, USA
    Biomed Eng Online 12:41. 2013
  7. ncbi request reprint Directional eye fixation sensor using birefringence-based foveal detection
    Boris I Gramatikov
    Krieger Children s Eye Center at The Wilmer Institute, The Johns Hopkins University School of Medicine, MD 21287 9028, USA
    Appl Opt 46:1809-18. 2007
  8. ncbi request reprint Automated detection of ocular focus
    David G Hunter
    Children s Hospital Boston, Department of Ophthalmology, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
    J Biomed Opt 9:1103-9. 2004
  9. ncbi request reprint Pediatric Vision Screener 2: pilot study in adults
    Deborah S Nassif
    Harvard Medical School, Children s Hospital Boston, Department of Ophthalmology, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
    J Biomed Opt 9:1369-74. 2004
  10. ncbi request reprint Pediatric Vision Screener 1: instrument design and operation
    David G Hunter
    Harvard Medical School, Children s Hospital Boston, Department of Ophthalmology, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
    J Biomed Opt 9:1363-8. 2004

Collaborators

Detail Information

Publications11

  1. ncbi request reprint Birefringence-based eye fixation monitor with no moving parts
    B I Gramatikov
    Johns Hopkins University School of Medicine, Wilmer Ophthalmological Institute, The Krieger Children s Eye Center, Baltimore, Maryland 21287 9028, USA
    J Biomed Opt 11:34025. 2006
    ..The algorithm is tested on a computer model, and the apparatus is tested on human subjects. This work demonstrates the feasibility of a fixation monitor with no moving parts...
  2. doi request reprint New pediatric vision screener, part II: electronics, software, signal processing and validation
    Boris I Gramatikov
    Laboratory of Ophthalmic Instrument Development, The Krieger Children s Eye Center at the Wilmer Eye Institute, The Johns Hopkins University School of Medicine, 233, 600 N Wolfe Street, Baltimore, MD, 21287 9028, USA
    Biomed Eng Online 15:15. 2016
    ..We have developed an improved pediatric vision screener (PVS) that can reliably detect central fixation, eye alignment and focus. The instrument identifies risk factors for amblyopia, namely eye misalignment and defocus...
  3. doi request reprint Detection of central fixation using short-time autoregressive spectral estimation during retinal birefringence scanning
    Boris I Gramatikov
    Ophthalmic Optics Laboratory, Wilmer Eye Institute, The Johns Hopkins University School of Medicine, 600 N Wolfe St, Wilmer 233, Baltimore, MD 21287, United States Electronic address
    Med Eng Phys 37:905-10. 2015
    ..The method enables the technology to work with less-cooperative patients, such as young children. Other medical and non-medical applications are possible...
  4. pmc Modern technologies for retinal scanning and imaging: an introduction for the biomedical engineer
    Boris I Gramatikov
    Laboratory of Ophthalmic Optics, Wilmer Eye Institute, Johns Hopkins University School of Medicine, 600 N, Wolfe St, Baltimore MD 21287, USA
    Biomed Eng Online 13:52. 2014
    ....
  5. doi request reprint A device for continuous monitoring of true central fixation based on foveal birefringence
    Boris Gramatikov
    Division of Pediatric Ophthalmology and Adult Strabismus, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Wilmer 233, 600 N Wolfe St, Baltimore, MD 21287, USA
    Ann Biomed Eng 41:1968-78. 2013
    ..A proof-of-concept has been obtained in a small study of ADHD patients and normal control subjects. ..
  6. pmc Detecting fixation on a target using time-frequency distributions of a retinal birefringence scanning signal
    Boris Gramatikov
    Laboratory of Ophthalmic Optics, Krieger Children s Eye Center, Pediatric Ophthalmology and Adult Strabismus, Wilmer Ophthalmological Institute, Johns Hopkins University School of Medicine, Rm 233, 600 N Wolfe St, Baltimore, Maryland, USA
    Biomed Eng Online 12:41. 2013
    ..With very young patients who are not cooperative enough, this presents a problem, because central fixation may be present only during very short-lasting episodes, and can easily be missed by the FFT...
  7. ncbi request reprint Directional eye fixation sensor using birefringence-based foveal detection
    Boris I Gramatikov
    Krieger Children s Eye Center at The Wilmer Institute, The Johns Hopkins University School of Medicine, MD 21287 9028, USA
    Appl Opt 46:1809-18. 2007
    ..The major advantage of this new eye-tracking method is that it uses true information coming from the fovea, rather than reflections from other structures, to identify the direction of foveal gaze...
  8. ncbi request reprint Automated detection of ocular focus
    David G Hunter
    Children s Hospital Boston, Department of Ophthalmology, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
    J Biomed Opt 9:1103-9. 2004
    ..A device that can assess focus rapidly and objectively will make it possible to perform low-cost, mass screening for focusing problems such as may exist in children at risk for amblyopia...
  9. ncbi request reprint Pediatric Vision Screener 2: pilot study in adults
    Deborah S Nassif
    Harvard Medical School, Children s Hospital Boston, Department of Ophthalmology, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
    J Biomed Opt 9:1369-74. 2004
    ..The PVS shows high sensitivity and specificity for detection of strabismus in adults. Future studies will determine whether this performance can be achieved in preschool children, who are at greatest risk for vision loss...
  10. ncbi request reprint Pediatric Vision Screener 1: instrument design and operation
    David G Hunter
    Harvard Medical School, Children s Hospital Boston, Department of Ophthalmology, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
    J Biomed Opt 9:1363-8. 2004
    ..With objective, automated measurement of both alignment and focus, the PVS represents a new approach to screening children for treatable eye disease such as amblyopia...
  11. ncbi request reprint Use of retinal nerve fiber layer birefringence as an addition to absorption in retinal scanning for biometric purposes
    Mikael Agopov
    Kirchhoff Institut für Physik, University of Heidelberg, INF 227, 69120 Heidelberg, Germany
    Appl Opt 47:1048-53. 2008
    ..The birefringence-derived signal proved to add useful information to the reflectance-absorption signature for retinal biometric scanning...