New Spectacles for Aphakia

British Standards for Spectacles.

EARLIER articles have reviewed parts of the work of the British Standards Institution in the field of standardization of spectacles (Brit. J. Ophthal., 1956, 40, 611; 1959, 43, 509), but the publication of B.S. 3521, completing the series of Standards relating to spectacles, provides the opportunity for a general survey. The nine British Standards fall into two categories with some overlap. The...

Contact lenses for infant aphakia.

We prospectively studied for three years the optical correction by contact lenses of 83 aphakic infants (141 eyes) who generally also had systemic and other ocular anomalies: 85% of the patients tolerated the lens wear for the whole study period. Complications occurred in 46 eyes and led to cessation of lens wear in two cases. Ten patients abandoned the lenses for other reasons. Thirty-four eye...

Coloured Spectacles

a new approach to credibility premium for zero-inflated poisson models for panel data

هدف اصلی از این تحقیق به دست آوردن و مقایسه حق بیمه باورمندی در مدل های شمارشی گزارش نشده برای داده های طولی می باشد. در این تحقیق حق بیمه های پبش گویی بر اساس توابع ضرر مربع خطا و نمایی محاسبه شده و با هم مقایسه می شود. تمایل به گرفتن پاداش و جایزه یکی از دلایل مهم برای گزارش ندادن تصادفات می باشد و افراد برای استفاده از تخفیف اغلب از گزارش تصادفات با هزینه پائین خودداری می کنند، در این تحقیق ...

Experimental Simulation of Aphakia.

WITH a correctly fitting pair of approximately -14 D. corneal contact lenses, a person with normal emmetropic eyes can become a 12 D. experimental hyperope, and he can very nearly simulate the exact type of vision of the spectacle-corrected aphakic by wearing a correctly fitted set of + 12-00 D. Sph. cataract spectacle lenses. With this "simulator of aphakia", the inquisitive scientific researc...