Resultant vertical prism in toric soft contact lenses ... | 合法醫療器材資訊網

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由 OD Melissa Barnett 著作 · 2018 — Compared to a prism-ballast design, periballast lenses do not have prism in the optical portion of the lens, thus allowing for a thinner lens profile ... Read More

2018年4月1日 — CONTACT LENS ANATOMY: THE PRISM BALLAST ... To minimize this, many manufacturers instead utilize a peri-ballast design in which a ... Read More

non-prism ballast design ... compared to spherical soft lenses even though the astigmatism remains ... optics (peri-ballast) and prism that is restricted to the lens. Read More

2015年2月10日 — Prism ballast is effective, but it has the disadvantage of adding thickness to the lens in the area of the lower limbus. This will reduce oxygen ... Read More

2020年7月31日 — The increased cost of toric lenses compared to spherical lenses may be ... Figure 1: Thickness profiles of a prism ballast (a) and peri-ballast (b) ... Read More

2017年1月25日 — There are several current toric contact lens designs: Prism Ballast Lenses that have a thin apex and thick base. Peri-Ballast Lenses that have ... Read More

2015年4月30日 — The peri-ballast approach attempts to minimise the prism ballast to increase comfort and reduce lower lid interaction. Peri-ballast designs are ... Read More

2013年10月25日 — Toric Contact Lenses Utilizing Prism-ballast And Peri-ballast Stabilization Methods Show Vertical Prism In The Central 6.0 Mm Of The Optic ... Read More