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Flicker electroretinograms recorded with mydriasis-free RETeval system before and after cataract surgery
- Source :
- Eye. 31:1589-1593
- Publication Year :
- 2017
- Publisher :
- Springer Science and Business Media LLC, 2017.
-
Abstract
- PurposeThe purpose of this study is to compare the amplitudes and peak times of the flicker electroretinograms (ERGs) recorded before and after cataract surgery with the RETeval system (LKC Technologies, Gaithersburg, MD, USA) from eyes without dilation.Patients and methodsThirty-two eyes of 32 patients (77.3±6.5 years) that had grade 2 Emery-Little nuclear or cortical cataract without any other abnormalities were studied. Flicker ERGs were recorded with the RETeval system under mydriatic-free conditions. Skin electrodes were used to pick-up the ERGs that were elicited by white light delivered at a rate of 28.3 Hz and intensity of 2, 8, and 32 Td-s. The amplitudes and peak times of the flicker ERGs before and after cataract surgery were compared.ResultsThe mean amplitudes were significantly increased after the removal of the cataractous lenses at the three stimulus intensities (2 Td-s, P0.0001; 8 Td-s, P0.0001; and 32 Td-s, P0.0001). The mean peak times of the flicker ERGs elicited by 2 and 8 Td-s were significantly shortened after the surgery (2 td-s, P0.0001 and 8 td-s, P=0.0127) but not at 32 td-s (P=0.595).ConclusionsThese results indicate that the presence of cataracts will affect both the amplitudes and the peak times of the flicker ERGs even if the cataract is mild. In addition, the results indicate that as stimulus intensity increases, the peak times is less affected by a cataract. The clarity of the crystalline lens should be considered when interpreting the flicker ERGs recorded with the RETeval system.
- Subjects :
- Male
0301 basic medicine
endocrine system
medicine.medical_specialty
Visual acuity
endocrine system diseases
genetic structures
Photic Stimulation
Visual Acuity
Dark Adaptation
After cataract
Cataract Extraction
Cataract
Flicker Fusion
Ophthalmoscopy
Cataract extraction
03 medical and health sciences
0302 clinical medicine
Electroretinography
medicine
Mydriasis
Humans
Postoperative Period
Aged
Retrospective Studies
Aged, 80 and over
medicine.diagnostic_test
business.industry
Flicker
Follow up studies
Middle Aged
Prognosis
eye diseases
Surgery
Ophthalmology
030104 developmental biology
Preoperative Period
Retinal Cone Photoreceptor Cells
Clinical Study
030221 ophthalmology & optometry
Female
sense organs
medicine.symptom
business
Follow-Up Studies
Subjects
Details
- ISSN :
- 14765454 and 0950222X
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Eye
- Accession number :
- edsair.doi.dedup.....3a89df4c0e5c97a2ff115c00bd5a1981