Abstract
Purpose
To compare retinal function changes in eyes with proliferative diabetic retinopathy (PDR) after intravitreal ranibizumab (IVR), combined or not with conventional (ETDRS) or multispot laser panretinal (PASCAL) photocoagulation (PRP).
Methods
This study included laser-naive PDR patients that required PRP. Eyes were randomly and prospectively assigned to receive IVR or IVR combined with PASCAL or EDTRS. PRP was performed at baseline in 1 (PASCAL) or 2 (ETDRS) sessions. In eyes with macular edema, macular short pulse grid laser was associated with IVR at baseline and IVR was repeated monthly or quarterly if neovascularization was detected on angiography. Comprehensive ophthalmological evaluations, including SD-OCT, were performed at baseline and every 4 weeks after treatment. Full-field electroretinography (ERG: extended ISCEV standard) was performed at baseline and at 12, 24 and 48 weeks.
Results
IVR = 13, PASCAL = 15 and ETDRS = 15 eyes finished 48-week follow-up. There was a statistically significant BCVA improvement of 0.1–0.3 logMAR in all groups, and fluorescein angiography leakage area (FLA) reduced in 56%, 73%, and 73% from baseline for ETDRS, IVR and PASCAL, respectively, up to 48 weeks without significant differences between groups (p > 0.05). A significant a- and b-wave amplitudes reduction was observed for dark- and light-adapted ERG for ETDRS and PASCAL, but only minor dark-adapted b-wave reduction was found for IVR, up to 48 weeks. As an example, at week 48, combined response b-wave amplitude reduced in 181.5 ± 31.4 µV, 128.0 ± 27.9 µV and 82.4 ± 15.2 µV for ETDRS, PASCAL and IVR (p < 0.05 each group), respectively. No significant difference was observed between ETDRS and PASCAL for any ERG parameter.
Conclusions
IVR combined with single or multiple spot PRP causes similar retinal function impairment during 48 weeks of observation, while IVR alone seems to be similarly effective controlling FLA without changing retinal function.
Similar content being viewed by others
References
Yau JW, Rogers SL, Kawasaki R, Lamoureux EL, Kowalski JW, Bek T, Chen SJ, Dekker JM, Fletcher A, Grauslund J, Haffner S, Hamman RF, Ikram MK, Kayama T, Klein BE, Klein R, Krishnaiah S, Mayurasakorn K, O’Hare JP, Orchard TJ, Porta M, Rema M, Roy MS, Sharma T, Shaw J, Taylor H, Tielsch JM, Varma R, Wang JJ, Wang N, West S, Xu L, Yasuda M, Zhang X, Mitchell P, Wong TY, Meta-Analysis for Eye Disease Study G (2012) Global prevalence and major risk factors of diabetic retinopathy. Diabetes Care 35:556–564
Engerman RL (1989) Pathogenesis of diabetic retinopathy. Diabetes 38:1203–1206
Group TDRSR (1976) Preliminary report on effects of photocoagulation therapy. The Diabetic Retinopathy Study Research Group. Am J Ophthalmol 81:383–396
Landers MB 3rd, Stefansson E, Wolbarsht ML (1982) Panretinal photocoagulation and retinal oxygenation. Retina 2:167–175
Vander JF, Duker JS, Benson WE, Brown GC, McNamara JA, Rosenstein RB (1991) Long-term stability and visual outcome after favorable initial response of proliferative diabetic retinopathy to panretinal photocoagulation. Ophthalmology 98:1575–1579
ETDRS (1991) Early photocoagulation for diabetic retinopathy. ETDRS report number 9. Early Treatment Diabetic Retinopathy Study Research Group. Ophthalmology 98:766–785
McDonald HR, Schatz H (1985) Macular edema following panretinal photocoagulation. Retina 5:5–10
Pender PM, Benson WE, Compton H, Cox GB (1981) The effects of panretinal photocoagulation on dark adaptation in diabetics with proliferative retinopathy. Ophthalmology 88:635–638
Henricsson M, Heijl A (1994) The effect of panretinal laser photocoagulation on visual acuity, visual fields and on subjective visual impairment in preproliferative and early proliferative diabetic retinopathy. Acta Ophthalmol (Copenh) 72:570–575
Khosla PK, Rao V, Tewari HK, Kumar A (1994) Contrast sensitivity in diabetic retinopathy after panretinal photocoagulation. Ophthalmic surgery 25:516–520
Blumenkranz MS, Yellachich D, Andersen DE, Wiltberger MW, Mordaunt D, Marcellino GR, Palanker D (2006) Semiautomated patterned scanning laser for retinal photocoagulation. Retina 26:370–376
Muqit MM, Marcellino GR, Gray JC, McLauchlan R, Henson DB, Young LB, Patton N, Charles SJ, Turner GS, Stanga PE (2010) Pain responses of Pascal 20 ms multi-spot and 100 ms single-spot panretinal photocoagulation: Manchester Pascal Study, MAPASS report 2. Br J Ophthalmol 94:1493–1498
Muqit MM, Marcellino GR, Henson DB, Young LB, Patton N, Charles SJ, Turner GS, Stanga PE (2010) Single-session vs multiple-session pattern scanning laser panretinal photocoagulation in proliferative diabetic retinopathy: The Manchester Pascal Study. Arch Ophthalmol 128:525–533
Chappelow AV, Tan K, Waheed NK, Kaiser PK (2012) Panretinal photocoagulation for proliferative diabetic retinopathy: pattern scan laser versus argon laser. Am J Ophthalmol 153(137–142):e132
Jorge R, Costa RA, Calucci D, Cintra LP, Scott IU (2006) Intravitreal bevacizumab (Avastin) for persistent new vessels in diabetic retinopathy (IBEPE study). Retina 26:1006–1013
Witmer AN, Vrensen GF, Van Noorden CJ, Schlingemann RO (2003) Vascular endothelial growth factors and angiogenesis in eye disease. Prog Retin Eye Res 22:1–29
Aiello LP, Avery RL, Arrigg PG, Keyt BA, Jampel HD, Shah ST, Pasquale LR, Thieme H, Iwamoto MA, Park JE et al (1994) Vascular endothelial growth factor in ocular fluid of patients with diabetic retinopathy and other retinal disorders. N Engl J Med 331:1480–1487
Tonello PS, Rosa AH, Abreu CH Jr, Menegario AA (2007) Use of diffusive gradients in thin films and tangential flow ultrafiltration for fractionation of Al(III) and Cu(II) in organic-rich river waters. Anal Chim Acta 598:162–168
Messias A, Filho JA, Messias K, Almeida FP, Costa RA, Scott IU, Gekeler F, Jorge R (2012) Electroretinographic findings associated with panretinal photocoagulation (PRP) versus PRP plus intravitreal ranibizumab treatment for high-risk proliferative diabetic retinopathy. Doc Ophthalmol 124:225–236
McCulloch DL, Marmor MF, Brigell MG, Hamilton R, Holder GE, Tzekov R, Bach M (2015) ISCEV Standard for full-field clinical electroretinography (2015 update). Doc Ophthalmol 130:1–12
Messias A, Jaegle H, Gekeler F, Zrenner E (2008) Software for evaluation of electroretinograms XLVI annual symposium of the international society for clinical electrophysiology of vision (ISCEV), Morgantown—USA
Tzekov R, Arden GB (1999) The electroretinogram in diabetic retinopathy. Surv Ophthalmol 44:53–60
Arden GB, Sidman RL, Arap W, Schlingemann RO (2005) Spare the rod and spoil the eye. Br J Ophthalmol 89:764–769
Moschos M (1982) ERG and VER findings after laser photocoagulation of the retina. Metab Pediatr Syst Ophthalmol 6:101–105
Schuele G, Rumohr M, Huettmann G, Brinkmann R (2005) RPE damage thresholds and mechanisms for laser exposure in the microsecond-to-millisecond time regimen. Invest Ophthalmol Vis Sci 46:714–719
Subash M, Comyn O, Samy A, Qatarneh D, Antonakis S, Mehat M, Tee J, Mansour T, Xing W, Bunce C, Viswanathan A, Rubin G, Weleber R, Peto T, Wickham L, Michaelides M (2016) The effect of multispot laser panretinal photocoagulation on retinal sensitivity and driving eligibility in patients with diabetic retinopathy. JAMA Ophthalmol 134:666–672
Willmann G, Nepomuceno AB, Messias K, Barroso L, Scott IU, Messias A, Jorge R (2017) Foveal thickness reduction after anti-vascular endothelial growth factor treatment in chronic diabetic macular edema. Int J Ophthalmol 10:760–764
Funding
FAPESP Grant Numbers: 2012/16265-0, and 2013/02169-2. Rodrigo Jorge received travel support from Novartis to attend the 2015 American Society of Retina Specialists (ASRS) meeting. The sponsor had no role in the design or conduct of this research.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.
Informed consent
All participants gave written informed consent before entering the study.
Statement of human rights
All procedures were in accordance with the ethical standards of the institutional research committee (Comitê de Ética em Pesquisa do Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto—USP, Protocol Number 11685/2012) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Statement on the welfare of animals
No animals were used in this research.
Rights and permissions
About this article
Cite this article
Messias, K., Barroso, R.M., Jorge, R. et al. Retinal function in eyes with proliferative diabetic retinopathy treated with intravitreal ranibizumab and multispot laser panretinal photocoagulation. Doc Ophthalmol 137, 121–129 (2018). https://doi.org/10.1007/s10633-018-9655-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10633-018-9655-9