我很难说出眼睛哪里不对劲，只是原照片中的女人视线略微上扬，看起来像是在做梦。而在你的画中，她的视线更多是直视前方，而且嘴角还带着一丝淡淡的微笑，而原照片中并没有这个细节。要想弄清楚哪里缺了，其实你应该先测量一下，或者先把原图描摹下来，然后盖在你的画上对比。我这样看，稍微仔细一点的话，你会发现你画的眼睛外角到头顶的距离比原图大，而且这个距离正好等于眼睛外角到嘴角的距离；另外，你画的嘴下方的部分也稍微大了一些。
我并不认为这幅画失败了，除非你坚持认为它必须与原图完全一致。问题在于是否必须如此。说不定你的潜意识里，她本来就是你画成这样子的。我绝对不觉得她难看；尽管嘴角略微下垂，但她拥有优美柔和的线条和一张非常友善的脸庞。
我也不认为我是适合指出问题的人选，因为我完全不擅长画肖像，而且乍看之下，眼睛的比例似乎是正确的。左眼大约是右眼的一半大小，这也是原图中可见的特征，所以问题顶多可能出在眼睛和瞳孔的位置上。感觉你的画中她的鼻子似乎有点大，但仔细观察原作的话，其实并非如此。

I find it hard to say what’s wrong with the eyes, apart from the fact that the original photo shows a woman looking up slightly and appearing to be daydreaming. In your version, she’s looking more straight ahead and also has a faint smile around her mouth, which is missing from the original photo. To know what’s missing, you’d actually need to measure it or trace the original first and then place that over your drawing. Looking at it like this, the distance from the corner of her eye to the top of her head is greater in your version than in the original, whilst that distance is the same as from the corner of her eye to the corner of her mouth; in your version, the area below her mouth is also slightly larger.
I don’t think the drawing is a failure; this only applies if you feel it has to look exactly like the example. The question is whether that needs to be the case. Who knows, perhaps your subconscious has her exactly as you’ve drawn her. I certainly don’t find her ugly; she has lovely soft lines and a very friendly face, despite the corners of her mouth turning down slightly.
I also don’t think I’m the right person to ask what’s wrong, as I’m not at all good at portraits and, at first glance, the proportions of the eyes seem to be correct. The left eye is also about half the size of the other eye, something you can see in the original too, so it could at most be the position of the eyes and the pupils. In some ways, her nose seems a bit too big in your version, but I don’t think that’s the case either if you look closely at the original.

@almaguer @iamguchidanart