RNFL loss was most evident in the temporal quadrant, where significant reduction was seen in primary progressive MS versus controls and in secondary versus primary progressive MS.

视网膜神经纤维层的缺失在颞象限最为明显，在原发性进行性多发性硬化与继发性进行性多发性硬化相比时降低显著。

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The mean RNFL thickness and macular volume were significantly reduced in secondary progressive MS, but not in primary progressive MS when compared with control RNFL thickness and macular volume.

继发性进展性多发性硬化患者平均视网膜神经纤维层的厚度和黄斑面积值亦降低，但与原发性进展性多发性硬化相比不降低。

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The 2nd kind of MS is called Primary Progressive.

VOA: special.2009.01.06

Twenty had relapsing remitting MS, 15 had secondary progressive MS, and five had primary progressive MS. Researchers also recruited 15 healthy control patients free from ophthalmological or neurological disease as a comparison group.

CNN: Can an eye exam detect multiple sclerosis?

Another type of MS is primary progressive disease where symptoms get worse from the outset.

BBC: Simple eye scan can reveal extent of Multiple Sclerosis