Precision Measurements

All measurements are captured on the patient’s visual axis (line of sight), a preference for Premium and Monofocal IOL’s

LENSTAR represents the only technology advancement in optical biometry in over 10 years to improve the refractive outcome for Premium IOLs.

LENSTAR, in one single scan provides the user with a complete biometric measurement of the patient’s eye, including Pachymetry (CCT), ACD, Lens Thickness, Axial Length, Keratometry, Pupillometry, White to White and Eccentricity of the Visual Axis, in 30 seconds or less. In addition, LENSTAR can be easily modified to measure special eye conditions such as Aphakic, Pseudophakic and Silicone Oil filled eyes.

Central Corneal Thickness (CCT)	Pachymetry: Central Corneal Thickness (CCT) CCT is measured with the precision of OLCR, with more accuracy versus ultrasound (+ - 2 microns) and improves patient flow by eliminating a separate pachymetry measurement.
Anterior Chamber Depth (ACD)	Anterior Chamber Depth (ACD) Utilizing the precision of OLCR, versus slit illumination technology of other optical biometers, “Anatomical ACD” is provided (endothelium to anterior lens surface) as well as “historical ACD” (epithelium to anterior lens surface). Precision ACD measurement is especially critical in hyperopic eyes.
Lens Thickness (LT)	Lens Thickness (LT) Lens Thickness is an important data point for 4th generation formulas such as Holladay II and predicted to become more important in future IOL power calculation formulas. This measurement precludes the need for a separate immersion ultrasound procedure and saves valuable time by streamlining your examination process.
Axial Length (AL)	Axial Length (AL) LENSTAR utilizes 820nm advanced Superluminescent Diode technology to provide precise Axial Length measurement along the patient’s visual axis, and penetrates dense media with exceptional precision.
Retinal Thickness (RT)	Retinal Thickness (RT) As with historical optical biometry, LENSTAR measures to the RPE and a correction factor is used to make the correction of measurement to the ILM. With an additional 10 second step, the user can obtain exact Retinal Thickness at the point of the patient’s line of sight – valuable information for pre-operative candidate screening for Premium IOLs and to indicate the need for additional OCT examination.
	Keratometry 32 markers, placed on two concentric rings (16 each) ensure precise keratometry and allow stable measurements even with non-compliant patients. The two concentric rings have 1.65mm and 2.3mm optical zones. All keratometric measurements are captured on the patient’s visual axis (i.e., line of sight).This is of high value for premium IOL outcomes as no other Keratometer measures on the visual axis.
	White to White Distance Lenstar measures white to white as horizontal limbal distance providing important information for sulcus fixated IOL’s and the Holladay II formula.
	Pupillometry Pupil diameter in ambient light condition is an important pre-operative measurement in the candidate selection process for premium IOLs. This LENSTAR measurement eliminates the need for a separate pupillometry procedure.
	Eccentricity of the Visual Axis The eccentricity of the visual optical line is assessed with respect to white-to-white as well as to the pupil center. This parameter is important in laser refractive surgery (for the determination of feasible optical zones) and can provide assistance to surgical incision planning.
	Special Eye Conditions LENSTAR measurements can be easily modified to accommodate various eye types such as aphakic, pseudophakic (PMMA, Silicone and Acrylic) and silicone oil filled eyes. These eye types can be quickly changed after the measurement procedure, if desired by the user.