The purpose of this study is to generate clinical data to quantify the impact of residual astigmatism on the overall visual performance during distance, intermediate, and near viewing in patients implanted with Clareon Vivity IOLs.
This single visit study is designed to help understand how vision is affected if the eye still has astigmatism after cataract surgery. Participants will be individuals who have already undergone cataract surgery and received a Clareon Vivity IOL in both eyes at least 4 months prior to study enrollment. During the study visit, trial lenses (glass lenses that are used during an eye exam) will be used to temporarily create the effect of astigmatism on the eye.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
40
Extended vision intraocular lens implanted in the capsular bag of the eye during cataract surgery. IOLs are intended for long term use over the lifetime of the cataract patient.
Grosinger, Spigelman & Grey Eye Surgeons, P.C
Bloomfield Hills, Michigan, United States
Key-Whitman Eye Center
Dallas, Texas, United States
Berkeley Eye Center
Sugar Land, Texas, United States
Mean Difference in Monocular Best Corrected Distance Visual Acuity (BCDVA) (4 Meters) Before and After Inducing 1.0 Diopter (D) Astigmatism - WTR
BCDVA was assessed with best refractive correction in place at a distance of 4 meters (m) using Early Treatment Diabetic Retinopathy Study (ETDRS) letter charts. Trial lenses were used to induce 1.0 diopter (D) of astigmatism with-the-rule (WTR), defined as -0.50/+1.00 D at approximately 180 degrees on the optical axis. VA was measured in the first implanted eye in logarithm minimum angle of resolution (logMAR), with a lower logMAR value indicating better visual acuity. The change in VA before and after inducing astigmatism is reported, with a positive value representing a decline in VA. No hypothesis testing was prespecified for this co-primary endpoint.
Time frame: Day 0 before induced astigmatism; Day 0 after induced astigmatism
Mean Difference in Monocular Distance Corrected Intermediate Visual Acuity (DCIVA) (66 Centimeters) Before and After Inducing 1.0 D Astigmatism - WTR
DCIVA was assessed with distance correction in place (plus or minus power) at a distance of 66 centimeters (cm) from the spectacle plane using ETDRS letter charts. Trial lenses were used to induce 1.0 D of astigmatism with-the-rule (WTR), defined as -0.50/+1.00 D at approximately 180 degrees on the optical axis. VA was measured in the first implanted eye in logarithm minimum angle of resolution (logMAR), with a lower logMAR value indicating better visual acuity. The change in VA before and after inducing astigmatism is reported, with a positive value representing a decline in VA. No hypothesis testing was prespecified for this co-primary endpoint.
Time frame: Day 0 before induced astigmatism; Day 0 after induced astigmatism
Mean Difference in Monocular Distance Corrected Near Visual Acuity (DCNVA) (40 cm) Before and After Inducing 1.0 D Astigmatism - WTR
DCNVA was assessed with distance correction in place (plus or minus power) at a distance of 40 cm from the spectacle plane using ETDRS letter charts. Trial lenses were used to induce 1.0 D of astigmatism WTR, defined as -0.50/+1.00 D at approximately 180 degrees on the optical axis.VA was measured in the first implanted eye in logarithm minimum angle of resolution (logMAR), with a lower logMAR value indicating better visual acuity. The change in VA before and after inducing astigmatism is reported, with a positive value representing a decline in VA. No hypothesis testing was prespecified for this co-primary endpoint.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Time frame: Day 0 before induced astigmatism; Day 0 after induced astigmatism
Mean Difference in Monocular Best Corrected Distance Visual Acuity (BCDVA) (4 Meters) Before and After Inducing 1.0 Diopter (D) Astigmatism - ATR
BCDVA was assessed with best refractive correction in place at a distance of 4 m using ETDRS letter charts. Trial lenses were used to induce 1.0 D of astigmatism against the rule (ATR), defined as -0.50/+1.00 D at approximately 90 degrees on the optical axis. VA was measured in the first implanted eye in logarithm minimum angle of resolution (logMAR), with a lower logMAR value indicating better visual acuity. The change in VA before and after inducing astigmatism is reported, with a positive value representing a decline in VA. No hypothesis testing was prespecified for this co-primary endpoint.
Time frame: Day 0 before induced astigmatism; Day 0 after induced astigmatism
Mean Difference in Monocular Distance Corrected Intermediate Visual Acuity (DCIVA) (66 Centimeters) Before and After Inducing 1.0 D Astigmatism.- ATR
DCIVA was assessed with distance correction in place (plus or minus power) at a distance of 66 cm from the spectacle plane using ETDRS letter charts. Trial lenses were used to induce 1.0 D of astigmatism ATR, defined as -0.50/+1.00 D at approximately 90 degrees on the optical axis. VA was measured in the first implanted eye in logarithm minimum angle of resolution (logMAR), with a lower logMAR value indicating better visual acuity. The change in VA before and after inducing astigmatism is reported, with a positive value representing a decline in VA. No hypothesis testing was prespecified for this co-primary endpoint.
Time frame: Day 0 before induced astigmatism; Day 0 after induced astigmatism
Mean Difference in Monocular Distance Corrected Near Visual Acuity (DCNVA) (40 cm) Before and After Inducing 1.0 D Astigmatism - ATR
DCNVA was assessed with distance correction in place (plus or minus power) at a distance of 40 cm from the spectacle plane using ETDRS letter charts. Trial lenses were used to induce 1.0 D of astigmatism ATR, defined as -0.50/+1.00 D at approximately 90 degrees on the optical axis. VA was measured in the first implanted eye in logarithm minimum angle of resolution (logMAR), with a lower logMAR value indicating better visual acuity. The change in VA before and after inducing astigmatism is reported, with a positive value representing a decline in VA. No hypothesis testing was prespecified for this co-primary endpoint.
Time frame: Day 0 before induced astigmatism; Day 0 after induced astigmatism