Contrast Sensitivity and Patient Reported Outcomes After Bilateral Implantation of a Bi-Aspheric Hydrophobic Trifocal Diffractive Intraocular Lens

Abstract

Purpose To assess contrast sensitivity and patient reported outcomes after uncomplicated cataract surgery with a new bi-aspheric diffractive trifocal intraocular lens (IOL) implantation. Methods Twenty-five patients who underwent bilateral implantation with the Asqelio Trifocal TFLIO130C IOL (AST Products Inc., Billerica, MA, USA) were analyzed at 6 months post-surgery. Binocular contrast sensitivity with and without glare was measured under photopic conditions (85 cd/m 2 ) and mesopic conditions (3 cd/m 2 ). Patients were asked to complete the Catquest-9SF patient outcomes questionnaire and a visual symptoms questionnaire. Results Photopic contrast sensitivity values were either within or above normal levels without glare; when glare was induced, the mean sensitivity values dropped just below normal range. Mesopic contrast sensitivity values were above or within normal range both with and without glare, except for 12 cpd with glare, where the mean fell just below the normal range. Differences in binocular contrast sensitivity threshold values with and without glare were significant for all spatial frequencies tested under both photopic and mesopic conditions ( p <0.05). The Catquest-9SF questionnaire outcomes showed that 88% of patients were either satisfied or very satisfied with their sight after the surgery, and in all cases, the results indicated no difficulty in performing different daily activities. The visual symptoms questionnaire indicated no relevant visual symptoms regarding frequency, intensity, or bothersomeness after implantation of the trifocal IOL. Conclusion This novel bi-aspheric diffractive trifocal IOL provides good contrast sensitivity outcomes under bright and dim lighting conditions. Patients were satisfied with the surgery, with no relevant visual symptoms.

Clinical Outcomes of a Bi-Aspheric Trifocal Diffractive Intraocular Lens

“…Table 4 summarizes the outcomes of the visual symptoms' questionnaire following the surgery. It indicates no relevant visual symptoms in either frequency, intensity or As expected for diffractive IOLs, and agreeing with previous reports with this IOL design, 8 the frequency was higher for halos than for the other visual symptoms, with 33% of patients reporting quite often (4%) or very often (29%) presence of halos, but 83% of patients report either no bothersome (58%) or a little (25%).…”

“…All these results align with, and slightly surpass, those documented by the authors in a study conducted on a comparable sample utilizing the same system. 8 Contrast sensitivity values are excellent under all conditions tested but, as indicated in that previous paper, it must be pointed out that the reference ranges considered in the analysis correspond to values obtained with a different CS system, due to the lack of an age-matched reference range with the CTS system used.…”

“…Figure 5 shows the mean contrast sensitivity function determined under photopic conditions (85 cd/m 2 ) with (A) and without glare (B) and under mesopic conditions (3 cd/m 2 ) with (C) and without glare (D). Since the Clinical Trial Suite system does not include a normality range for healthy subjects under each of the conditions measured photopic and mesopic, with and without glare and similarly to previous reports by the authors, 8 the normative ranges for healthy unoperated eyes above 60 years of age used by Escaf et al 14 using the Functional Acuity Contrast Test (F.A.C.T.) were used in the present study as a reference to assess CSF outcomes.…”

“…Previous clinical studies done on this lens showed good visual and refractive outcomes on the short follow-up (1–3 months) 6 , 7 and contrast sensitivity and patient reported outcomes. 8 However, to the authors’ knowledge, there are no clinical peer-review publications of this lens analyzing specifically its visual and refractive outcomes at longer follow-ups with different visual metrics and questionnaires. Thus, the purpose of the present clinical study was to provide postoperative visual performance at different distances and different lighting conditions, effect of glare, refractive outcomes, and patient-reported outcomes in cataract patients with bilateral implantation at 6 months of follow-up.…”