Tri-curve lens BOZR = 7.90mm. Aspheric design BOZR = 8.00mm. • Keratometry only measures the central corneal curvature, yet the RGP lens also rests on the corneal periphery. Three patients, all with ‘K’ reading of 7.80mm spherical and with identical RGP lenses of 7.80mm BOZR may show differing fluorescein fit patterns.

Zone Radius (BOZR), the fluorescein pattern will show an alignment fit for optimal lens performance. PERIPHERAL FIT: Peripheral clearance should encroach up to 1mm in from the edge of the lens in the flatter meridian but may be more in the steeper meridian in toric eyes.

The radius of curvature of the back surface of the lens is known as the back optic zone radius (BOZR) and the size of this optic is termed the back optic zone diameter (BOZD). The total diameter (TD) describes the overall size of the lens.

Bausch + Lomb is the recognised world leader in the research, development and supply of gas permeable contact lenses. Since Silicone Acrylate materials were first introduced under the BOSTON® brand, Bausch + Lomb has improved the oxygen permeability, durability, wetting and comfort characteristics.

In addition, modern RGP lens designs can fit a wide range of the normal ametropic popula-tion, so practitioners need only specify the back optic zone radius (BOZR), total diameter (TD) and back vertex power (BVP) from a particu-lar lens design for the manufacturer to produce the lens.

2022年1月15日 · Alingment – Fluorescein Pattern – The ideal RGP lens should show alignment of the back surface of the lens with the cornea over most of the surface. The alignment of the lens back surface allows maximum tear exchange with minimum pressure over the cornea.

2023年9月9日 · Back optic zone radius (BOZR), back peripheral zone radii, and front surface radius can be measured for verification. The BOZR is a very important parameter to verify in an RGP contact lens since it affects the lens-to-cornea fitting relationship.

Verifying Back Optic Zone Radius (BOZR) The back optic zone radius, or base curve, is arguably the most critical parameter to verify on an RGP lens. It directly impacts the lens-to-cornea fitting relationship and can significantly affect comfort, vision, and ocular health. Using a Radiuscope. The radiuscope is the gold standard for BOZR ...

Measuring BOZR Usually, this is the most important or useful parameter to establish. Ideally, the practice will have a radiuscope, which may be monocular or binocular. Figure 1shows a standard binocular version with mechanical measuring gauge. Some instruments have a digital scale or even an internal one viewed via the eye pieces. Using ...

镜片基弧（BOZR）是指后光学区曲率半径。 基弧是角膜接触镜，也就是俗称的隐形眼镜的一个指标性数据，大小用镜片的曲率半径表示。 角膜接触镜分为硬性角膜接触镜（RGP）和软性角膜接触镜。 硬性角膜接触镜的基弧以及其他数据指标都是完全按照使用者的眼球情况一比一制作，软性角膜接触镜则采用适应性基弧制作的方法。 软性角膜接触镜基弧越大，意味着镜片的内表面越平坦，如果镜片的基弧大于眼球的基弧，就可能出现镜片贴不住眼球，容易移位的情况，如果镜片 …