Identification of Minimum Focal Points in Vision Curve Formation

Identification of Minimum Focal Points in Vision Curve Formation After Pseudophakic Presbyopia Surgery

The primary objective of this study is to identify how many focal points and at which distances are necessary for reliable visual curve formation and area of the curve (AoC) calculation using mathematical models and comparing the results to measurements acquired from participants that underwent uncomplicated pseudophakic presbyopia surgery.

This is a prospective, non-inferiority trial. 80 participants that underwent uncomplicated pseudophakic presbyopia surgery with bilateral premium intraocular lenses (IOL) implantation will be recruited, and their postoperative Visual Curves (VAC) will be evaluated for nine distances (25, 28, 33, 40, 50, 60, 100, 200, 300 cm). Then, using polynomial and spline interpolation methods on the measured data, the aim is to generate a unique polynomial of degree ninc -1 that satisfies all data points.

Inclusion Criteria:

• age over 40,
• previous bilateral premium cataract surgery,
• best corrected visual acuity (BCVA) < 0,2 logMAR

Exclusion Criteria:

• taking topical medication to reduce intraocular pressure (IOP),
• macular diseases,
• corneal diseases,
• inability to understand the procedure,
• postoperative astigmatism >1.50 diopters,
• postoperative clouding of the posterior capsule