Skip to main content
Journal cover image

Retinal Anatomy and Electrode Array Position in Retinitis Pigmentosa Patients After Argus II Implantation: An International Study.

Publication ,  Journal Article
Gregori, NZ; Callaway, NF; Hoeppner, C; Yuan, A; Rachitskaya, A; Feuer, W; Ameri, H; Arevalo, JF; Augustin, AJ; Birch, DG; Dagnelie, G; Ho, AC ...
Published in: Am J Ophthalmol
September 2018

PURPOSE: To assess the retinal anatomy and array position in Argus II retinal prosthesis recipients. DESIGN: Prospective, noncomparative cohort study. METHODS: Setting: International multicenter study. PATIENTS: Argus II recipients enrolled in the Post-Market Surveillance Studies. PROCEDURES: Spectral-domain optical coherence tomography images collected for the Surveillance Studies (NCT01860092 and NCT01490827) were reviewed. Baseline and postoperative macular thickness, electrode-retina distance (gap), optic disc-array overlap, and preretinal membrane presence were recorded at 1, 3, 6, and 12 months. MAIN OUTCOME MEASURES: Axial retinal thickness and axial gap along the array's long axis (a line between the tack and handle); maximal retinal thickness and maximal gap along a B-scan near the tack, midline, and handle. RESULTS: Thirty-three patients from 16 surgical sites in the United States and Germany were included. Mean axial retinal thickness increased from month 1 through month 12 at each location, but reached statistical significance only at the array midline (P = .007). The rate of maximal thickness increase was highest near the array midline (slope = 6.02, P = .004), compared to the tack (slope = 3.60, P < .001) or the handle (slope = 1.93, P = .368). The mean axial and maximal gaps decreased over the study period, and the mean maximal gap size decrease was significant at midline (P = .032). Optic disc-array overlap was seen in the minority of patients. Preretinal membranes were common before and after implantation. CONCLUSIONS: Progressive macular thickening under the array was common and corresponded to decreased electrode-retina gap over time. By month 12, the array was completely apposed to the macula in approximately half of the eyes.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Am J Ophthalmol

DOI

EISSN

1879-1891

Publication Date

September 2018

Volume

193

Start / End Page

87 / 99

Location

United States

Related Subject Headings

  • Visual Prosthesis
  • Visual Acuity
  • Retinitis Pigmentosa
  • Retina
  • Prosthesis Implantation
  • Prospective Studies
  • Ophthalmology & Optometry
  • Middle Aged
  • Male
  • Internationality
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Gregori, N. Z., Callaway, N. F., Hoeppner, C., Yuan, A., Rachitskaya, A., Feuer, W., … Zacks, D. N. (2018). Retinal Anatomy and Electrode Array Position in Retinitis Pigmentosa Patients After Argus II Implantation: An International Study. Am J Ophthalmol, 193, 87–99. https://doi.org/10.1016/j.ajo.2018.06.012
Gregori, Ninel Z., Natalia F. Callaway, Catherine Hoeppner, Alex Yuan, Aleksandra Rachitskaya, William Feuer, Hossein Ameri, et al. “Retinal Anatomy and Electrode Array Position in Retinitis Pigmentosa Patients After Argus II Implantation: An International Study.Am J Ophthalmol 193 (September 2018): 87–99. https://doi.org/10.1016/j.ajo.2018.06.012.
Gregori NZ, Callaway NF, Hoeppner C, Yuan A, Rachitskaya A, Feuer W, et al. Retinal Anatomy and Electrode Array Position in Retinitis Pigmentosa Patients After Argus II Implantation: An International Study. Am J Ophthalmol. 2018 Sep;193:87–99.
Gregori, Ninel Z., et al. “Retinal Anatomy and Electrode Array Position in Retinitis Pigmentosa Patients After Argus II Implantation: An International Study.Am J Ophthalmol, vol. 193, Sept. 2018, pp. 87–99. Pubmed, doi:10.1016/j.ajo.2018.06.012.
Gregori NZ, Callaway NF, Hoeppner C, Yuan A, Rachitskaya A, Feuer W, Ameri H, Arevalo JF, Augustin AJ, Birch DG, Dagnelie G, Grisanti S, Davis JL, Hahn P, Handa JT, Ho AC, Huang SS, Humayun MS, Iezzi R, Jayasundera KT, Kokame GT, Lam BL, Lim JI, Mandava N, Montezuma SR, Olmos de Koo L, Szurman P, Vajzovic L, Wiedemann P, Weiland J, Yan J, Zacks DN. Retinal Anatomy and Electrode Array Position in Retinitis Pigmentosa Patients After Argus II Implantation: An International Study. Am J Ophthalmol. 2018 Sep;193:87–99.
Journal cover image

Published In

Am J Ophthalmol

DOI

EISSN

1879-1891

Publication Date

September 2018

Volume

193

Start / End Page

87 / 99

Location

United States

Related Subject Headings

  • Visual Prosthesis
  • Visual Acuity
  • Retinitis Pigmentosa
  • Retina
  • Prosthesis Implantation
  • Prospective Studies
  • Ophthalmology & Optometry
  • Middle Aged
  • Male
  • Internationality