Purpose. To compare the contrast sensitivity levels of thyroid associated ophthalmopathy (TAO) patients without obvious optic neuropathy with those of healthy people. Methods. Forty eyes of 20 TAO patients without dysthyroid optic neuropathy and 40 eyes of 20 healthy subjects were evaluated in this prospective case-controlled study. The contrast sensitivity functions (CSFs) of all subjects were measured by the functional acuity contrast test (FACT) in five frequencies which were 1,5 cpd (A), 3 cpd (B), 6 cpd (C), 12 cpd (D), and 18 cpd (E). Results were compared for both groups, and a correlation of CSF with Hertel and clinical activity scores was assessed. Results. There was no statistically significant difference between TAO patients and control groups for age and sex. TAO patients had lower levels than the control group in all the frequencies of CSFs (P < 0.05) and the difference in contrast sensitivity functions between the groups seems to be more significant in higher frequencies (B, C, D, and E) (P < 0.001). Conclusions. TAO patients without DON can have contrast sensitivity loss and this would probably imply subtle optic nerve dysfunction in early disease phase.

Bu makale iThenticate programıyla taranmıştır.This article was checked by iThenticate.

Eğerci köyü ferromanganez cevherleşmesi, Yerköy (Yozgat) ilçesinin 16 km güney batısında bazalt kireçtaşı dokanağı ile kireçtaşının içerisinde bantlı yer yer ise ağsal yapıda gözlenmektedir. Cevher parajenezi; pirolusit, ramsdellit, götit ve manyetittir. Gang mineralleri ise çoğunlukla kalsit daha az oranda ise kuvarstır. Çalışma alanında farklı pirolusit oluşumları gözlenmiştir. Bazıları ince kristalli bazıları ise daha iri kristalli ve yapraklanma şeklindedir. Bir başka doku şekli ise kırık ve çatlakları doldurur şekilde ornatım ürünü olarak gelişmiş pirolusitlerdir. Yer yer ramsdellitin ramplasmanı ile oluşmuş pirolusitler ile pirolusitin götiti ornattığı dokular da belirlenmiştir. Bunun yanında bazı götitlerde oolitik ve kolloidal dokular gözlenmektedir. Yapılan saha çalışmaları ve tüm bu ilk bulgular ışığında cevherleşmenin en az iki evrede oluştuğu düşünülebilir.

No abstract

Eğerci village is located 16 km southwest of Yerköy (Yozgat) area which has a ferromanganese deposit that formed at the contact between basalt and limestone and shows that a banded stockwork structure occurs occasionally within the limestone. The mineralization consists of pyrolusite, goethite, and ramsdellite, together with a lesser quantity of magnetite. Gangue minerals are determined as calcite and quartz. REE data from the mineral samples demonstrate a range from 2.70 - 63.70 ppm and the average value is 28.00. These results permit a comparison to be made with mineralization in hydrothermal deposits. Moreover, mineral samples show a positive Eu anomaly 0.88-48.10 ppm (ave. 9.94 ppm). The Ce anomaly values vary between 0.02 and 0.88 ppm (ave. 0.58 ppm). It is possible that the mineralization may be affected by the mixing of seawater and hydrothermal fluids. The value of the positive Eu anomaly is evidence of modern oceanic hydrothermal manganese deposits. Insight of previous fluid inclusion, studies can be easily inferred that mineralization can occur at three different stages. The temperature of the first stage ranged from 338 oC to 428 oC and other stages vary from 269 oC - 317 oC and 143 oC - 236 oC, respectively. As a comparison, calculated salinity is higher in Type I fluid inclusions (1.9-14.7 wt.% NaCl equiv.) than Type II and III fluid inclusions (1.9-5.1 wt.%NaCl (equiv.) It is possible that the mineralization was formed by the mixing of magmatic and meteoric waters.