Posterior chamber intraocular lens implantation in eyes with inactive and active proliferative diabetic retinopathy.


Ruiz R. S., Saatci O. A.

American journal of ophthalmology, vol.111, no.2, pp.158-62, 1991 (Scopus) identifier identifier

Abstract

A space $X$ has a $\mathbb{Q}$-diagonal if $X^2\setminus \Delta$ has a $\mathcal{K}(\mathbb{Q})$-directed compact cover. We show that any compact space with a $\mathbb{Q}$-diagonal is metrizable, hence any Tychonorff space with a $\mathbb{Q}$-diagonal is cosmic. These give a positive answer to Problem 4.2 and Problem 4.8 in \cite{COT11} raised by Cascales, Orihuela and Tkachuk.