Visual Psychophysics / Physiological Optics - ARVO

ARVO 2013 Annual Meeting Abstracts by Scientific Section/Group – Visual Psychophysics / Physiological OpticsSA6 between each eye (ie SA4-0.4μm and SA6+0.2μm on one eyeand SA4+0.4μm and SA6-0.2μm on the other eye). Pupil diametervariations had to be taken into account when using simulated images.The decrease of pupil size in near vision led to a better TF subjectivevision especially with combination of SA4 and SA6. Although wedistinguished two different optical performance profiles (ie (i) gooddistance vision/acceptable intermediate vision/poor near vision, and(ii) good distance vision/poor intermediate vision/good near vision)there was a good correlation (r2=0.89) between AUC and meanquality of vision at distance/intermediate and near vision.Conclusions: There is no binocular summation of quality of vision.However the use of different SA profiles on each eye especiallyreverse profile of SA4 and SA6 profile involved a better binocular TFsubjective vision.Commercial Relationships: Guillaume Van Der Meer, None;Pierre-Jean Pisella, None; Richard Legras, NoneProgram Number: 828 Poster Board Number: B0052Presentation Time: 1:00 PM - 2:45 PMInfluence of Pupil Diameter on Intraocular ScatteringMeasurements Based on Double Pass Images in Patients withDifferent Types of CataractsJaume Pujol 1 , Juan Carlos Ondategui Parra 2 , Joan A. Martinez-Roda 2 , Meritxell Vilaseca 1 , Mouafk Asaad Ammaar 3 . 1 Centre forSensors, Instruments and Systems Development (CD6),, UniversitatPolitecnica Catalunya, Terrassa, Spain; 2 University Vision Center(CUV), Universitat Politècnica Catalunya (UPC), Terrassa, Spain;3 Ophthalmology, Hospital de Terrassa, Terrassa, Spain.Purpose: To assess the influence of pupil diameter size onintraocular scattering measurements obtained from double passimages in patients with different type of cataracts.Methods: Intraocular scattering was measured using a comercialdouble-pass system (Optical Quality Analysis System, OQAS,Visiometrics, Spain) (Güell et al. J Cataract Refr Surg 2004) andquantified using Objective Scattering Index (OSI)(Artal et al. Plosone 2011; Vilaseca et al Br. J. Ophthalmol. 2012) in four groups ofpatients with cataracts (nuclear (NC), cortical (CC), posteriorsubcapsular (PSC) and cortical-nuclear mixed (CNMC)). Cataractswere classified using a LOCS III system. Measurements wereperformed using two different pupil diameters: 4mm (with andwithout cycloplegic drops) and 7mm (with cycloplegic drops), whichwere obtained using the artificial pupil of OQAS system.Results: 56,5% of the subjects were female where 48 eyes (of 55patients with cataracts). Cataract classification showed: 29 NC, 12PSC; 18 SPC and 26 CNMC). Mean ages (± SD [range]) were of68.3±8.20 (47 to 85 yr.) There are not differences in OSI valuesobtained for a pupil diameter of 4 mm either with or withoutcyclopegia. The correlations between OSI (4mm) and OSI (7mm)using cyclopegia were: NC r=0.804 (p=0.00); PSC r=0.608 (p=0.07);CC r=0.957 (p=0.00) and CNMC r=0.769 (p=0.00). OSI parametershowed a high correlation between both pupil diameters. Mean± SDOSI results for 4mm and 7mm pupil were: NC 3.7±2.2 / 6.0±3.4;PSC 3.1±1.7 / 4.8±2.0; CC 3.5±2.3 / 6.3±3.8 and CNMC 5.0±3.4 /7.4±3.5. All OSI values presented a proportional increase for eachtype of cataracts. Similar changes were obtained considering theclassification according LOCSIII system. The increase in OSI values(lower in PSC and higher in CC) probably can be due to theperipherical distribution of cataract in CC and to the central lensopacity on PSC.Conclusions: OSI results increase when pupil diameter is higher, butwe have not found difference to classify different types of cataracts.We can conclude that OSI parameter provides useful information toclassify cataracts regardless of pupil diameter. Future work will befocused on a larger number of patients with cortical and subcapsularcataracts.Commercial Relationships: Jaume Pujol, Visiometrics (P); JuanCarlos Ondategui Parra, None; Joan A. Martinez-Roda, None;Meritxell Vilaseca, None; Mouafk Asaad Ammaar, NoneSupport: “Ministerio de Educación y Ciencia”, Spain (grant n0DPI2011-30090-C02-01 and European UnionProgram Number: 829 Poster Board Number: B0053Presentation Time: 1:00 PM - 2:45 PMCapsular Adhesion to Intraocular Lens Evaluated In Vivo UsingUltralong-scan-depth Optical Coherence TomographyYinying Zhao, Jin Li, Weilin Lu, Xiaoying Xing, Fan Lu, Yune Zhao.wenzhou medical college, Wenzhou, China.Purpose: A firm capsular apposition to the intraocular lens (IOL)could inhibit lens epithelial cell proliferation and migration. Manyresearchers have focused on the design and material of the IOL.However, we found few studies evaluating the capsule-IOLinteraction in highly myopic eyes. This study was to evaluate the invivo capsular apposition to IOL in patients by ultralong-scan-depthoptical coherence tomography (OCT).Methods: It is an observational case series research. Thirty eyes from30 cataract patients were recruited at the Affiliated Eye Hospital,Wenzhou Medical College, of which 15 eyes were highly myopic(axial length >26 mm) and 15 eyes were emmetropic (22 mm