The condition appears to result from the cumulative effect of a number of factors, with atmospheric pollutants the principal culprits.

这种情况似乎是由许多因素的累积的结果，而大气污染物是主要的罪魁祸首。

youdao

The extent to which genes are to blame varies, but for those with the worst vision, around 80% of the condition is caused by genetic factors.

在多大程度上归咎于基因并不一定，但是对于那些视力最差的人来说，80%的情况下是由遗传因子导致的。

youdao

And, there are a number of other factors to consider, such as time of day, environment, the physical condition of participants, and whether reading is for entertainment or business.

其次，还有一些因素也应该考虑，如一天中的什么时段，阅读环境，参与者的身体状况，娱乐性阅读还是商务阅读。

youdao

Right now, the only confirmed risk factors for the condition are age, genes, and smoking, so scientists are hoping to identify things that people can do to reduce their risk for the condition.

CNN: Fish, olive oil, nuts good for eyes too, more studies find

The market is even larger given the new appreciation for a condition called the metabolic syndrome, a hodgepodge of risk factors for diabetes and heart disease that is estimated to afflict some 50 million Americans.

FORBES: Lose Weight, Quit Smoking With One Pill

Such discretion is acceptable to public shareholders under the condition that the Compensation Committee clearly explains the business factors that were considered in applying such discretion.

FORBES: Paying Top Talent after the IPO