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The Success of Cataract Surgery and the Preoperative Measurement of Retinal Function by Electrophysiological Techniques.

An J, Zhang L, Wang Y, Zhang Z - J Ophthalmol (2015)

Bottom Line: The 95% confidence intervals (CIs) of the amplitudes of center point mfERG were calculated for a range of preoperative VA values.Most of the patients within 95% CI of the center point mfERG had a postoperative VA more than 0.5.Conclusions.

View Article: PubMed Central - PubMed

Affiliation: Department of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an 710032, China ; Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China.

ABSTRACT
Purpose. To study the effect of different electrophysiological methods to evaluate retinal function prior to cataract surgery. Methods. Cataract patients who had no significant other eye disease were chosen. VA, pattern visual evoked potential (PVEP), electroretinogram (ERG), and multifocal electroretinogram (mfERG) responses were measured from 150 cataract patients and 20 control subjects. Results. When the preoperative VA was more than 0.3 in cataract patients, the amplitude of PVEP was not significantly different between cataract and control subjects. The amplitude of central point mfERG was significantly lower in cataract patients compared with control group from HM to 0.8 of preoperative VA. The 95% confidence intervals (CIs) of the amplitudes of center point mfERG were calculated for a range of preoperative VA values. Most of the patients within 95% CI of the center point mfERG had a postoperative VA more than 0.5. Conclusions. The amplitude of central point mfERG in cataract patients was the most relevant parameter to the preoperative VA compared with PVEP and ERG. The 95% CI of the amplitude of central point mfERG for each level of VA could help to evaluate preoperative macular function which is used to predict the outcome of cataract surgery.

No MeSH data available.


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mfERG responses of cataract patients with low VA undergoing cataract surgery. (A-G) The amplitude of each point mfERG of 1 to 7 patients. (H) The fundus of patient 7 after cataract operation suffers from macular epiretinal membrane. NAS: nasal side; TEM: temporal side.
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fig6: mfERG responses of cataract patients with low VA undergoing cataract surgery. (A-G) The amplitude of each point mfERG of 1 to 7 patients. (H) The fundus of patient 7 after cataract operation suffers from macular epiretinal membrane. NAS: nasal side; TEM: temporal side.

Mentions: The postoperative VA of 7 eyes was less than 0.5. The postoperative VA in 2 patients was less than 0.3. Female patient number 1, aged 67 years, had a pre- and postoperative VA of 0.25, with a 95% CI of 0.3 > VA ≥ 0.2 of 12.46 to 14.18 nV/deg2. A 73-year-old female patient number 2 had a pre- and postoperative VA of 0.3 and a 95% CI of 0.5 > VA ≥ 0.3 of 13.30 to 16.22 nV/deg2. The amplitude of the central point mfERG was 9.6 nV/deg2 and 11.6 nV/deg2 for patients 1 and 2, respectively, which were less than the lower level value of the 95% CI (Figure 6).


The Success of Cataract Surgery and the Preoperative Measurement of Retinal Function by Electrophysiological Techniques.

An J, Zhang L, Wang Y, Zhang Z - J Ophthalmol (2015)

mfERG responses of cataract patients with low VA undergoing cataract surgery. (A-G) The amplitude of each point mfERG of 1 to 7 patients. (H) The fundus of patient 7 after cataract operation suffers from macular epiretinal membrane. NAS: nasal side; TEM: temporal side.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4631904&req=5

fig6: mfERG responses of cataract patients with low VA undergoing cataract surgery. (A-G) The amplitude of each point mfERG of 1 to 7 patients. (H) The fundus of patient 7 after cataract operation suffers from macular epiretinal membrane. NAS: nasal side; TEM: temporal side.
Mentions: The postoperative VA of 7 eyes was less than 0.5. The postoperative VA in 2 patients was less than 0.3. Female patient number 1, aged 67 years, had a pre- and postoperative VA of 0.25, with a 95% CI of 0.3 > VA ≥ 0.2 of 12.46 to 14.18 nV/deg2. A 73-year-old female patient number 2 had a pre- and postoperative VA of 0.3 and a 95% CI of 0.5 > VA ≥ 0.3 of 13.30 to 16.22 nV/deg2. The amplitude of the central point mfERG was 9.6 nV/deg2 and 11.6 nV/deg2 for patients 1 and 2, respectively, which were less than the lower level value of the 95% CI (Figure 6).

Bottom Line: The 95% confidence intervals (CIs) of the amplitudes of center point mfERG were calculated for a range of preoperative VA values.Most of the patients within 95% CI of the center point mfERG had a postoperative VA more than 0.5.Conclusions.

View Article: PubMed Central - PubMed

Affiliation: Department of Clinical Aerospace Medicine, Fourth Military Medical University, Xi'an 710032, China ; Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China.

ABSTRACT
Purpose. To study the effect of different electrophysiological methods to evaluate retinal function prior to cataract surgery. Methods. Cataract patients who had no significant other eye disease were chosen. VA, pattern visual evoked potential (PVEP), electroretinogram (ERG), and multifocal electroretinogram (mfERG) responses were measured from 150 cataract patients and 20 control subjects. Results. When the preoperative VA was more than 0.3 in cataract patients, the amplitude of PVEP was not significantly different between cataract and control subjects. The amplitude of central point mfERG was significantly lower in cataract patients compared with control group from HM to 0.8 of preoperative VA. The 95% confidence intervals (CIs) of the amplitudes of center point mfERG were calculated for a range of preoperative VA values. Most of the patients within 95% CI of the center point mfERG had a postoperative VA more than 0.5. Conclusions. The amplitude of central point mfERG in cataract patients was the most relevant parameter to the preoperative VA compared with PVEP and ERG. The 95% CI of the amplitude of central point mfERG for each level of VA could help to evaluate preoperative macular function which is used to predict the outcome of cataract surgery.

No MeSH data available.


Related in: MedlinePlus