Primary objective of this study was to compare the efficacy of premium monovision with Restor and Panoptix, against other prevalent monovision techniques and against bilateral Panoptix implantation in a sample of patients following lens-extraction surgery.
Four study groups were formed according to the procedure and the intraocular lens technology that was used: a) Monovision Group (MoG), b) Multifocal Lens Group (MfG), c) Hybrid Monovision Group (HmG), and, d) Premium Monovision Group (PmG). Patients who have undergone one of the above categories of presbyopia correction surgery were selected to compare the effectiveness of these techniques by evaluating the uncorrected near, intermediate and distant visual acuity as well as the degree of subjective patient satisfaction, contrast sensitivity, dysphotopsia symptoms and spectacle independence .
Study Type
OBSERVATIONAL
Enrollment
120
The following clinical indexes are evaluated: 1. Binocular uncorrected distant visual acuity (bUD-VA) using the Greek version of the Early Treatment Diabetic Retinopathy Study Chart at four meters distance 2. Binocular uncorrected reading acuity at 60cm (bUI-RA) and at 40cm (bUN-RA), and 3. Binocular uncorrected critical print size at 60cm (bUI-CPS) and at 40cm (bUN-CPS). All near and intermediate vision parameters are obtained using the Democritus Digital Acuity Reading Test (DDART), which is based on the Greek version of MNREAD. Contrast sensitivity are evaluated with the Pelli-Robson test.
Department of Ophthalmology, University Hospital of Alexandroupolis
Alexandroupoli, Evros, Greece
Binocular uncorrected distant visual acuity [bUD-VA]
bUD-VA is obtained using the Greek version of the Early Treatment Diabetic Retinopathy Study Chart at four meters distance. This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
Binocular uncorrected intermediate reading acuity (at 60cm) [bUI-RA)]
bUI-RA is obtained using the DDART reading test, which is based on the Greek version of MNREAD. This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
binocular uncorrected near reading acuity (at 40cm) [bUN-RA]
bUN-RA is obtained using the DDART reading test, which is based on the Greek version of MNREAD. This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
binocular uncorrected intermediate critical print size (at 60cm) [bUI-CPS]
bUI-CPS is obtained using the DDART reading test, which is based on the Greek version of MNREAD. This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
binocular uncorrected near critical print size (at 40cm )[bUN-CPS]
bUN-CPS is obtained using the DDART reading test, which is based on the Greek version of MNREAD. This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
Dysphotopsia symptoms
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Dysphotopsia is evaluated with two direct 4-scale, Likert-type questions (Always, Most of the times, Sometimes, Never) pertaining on the subjective perception of glare and unwanted shadows. This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
Contrast sensitivity
Contrast sensitivity is evaluated with the Pelli-Robson test. This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
Spectacle independence
Spectacle dependence is also evaluated for both distant and near vision by two direct 4-scale Likert-type questions (Always, Most of the times, Sometimes, Never). This parameter is obtained six months following the operation of the second eye.
Time frame: through study completion, an average of 2.5years
Subjective satisfaction using Visual Function Index (VF-14 instrument) (total score, VF14-NV score & VF14-DV score)
Subjective satisfaction rates are assessed using the prevalent VF-14 instrument. Further to the total VF-14 score assessment, two additional scores are calculated: a) Near vision VF score (VF14-NV) derived from items that assess the perceived difficulty in near vision activities (items 1,2,3,7,8,9 and 11), and, b) Distant vision VF score (VF14-DV) derived from items that assess the perceived difficulty of distant vision activities (items 4, 5, 6, 10, 12, 13 and 14). VF-14 has a final score from 0 to 100. A score of 100 indicates able to do all applicable activities. A score of 0 indicates unable to do all applicable activities because of vision.
Time frame: through study completion, an average of 2.5years