What Is In The Picture.

There is a picture in front of me. In the description was said there is an
Optical illusion image. (The description said this is an optical illusion image.)

First of all, (comma added) I see a young woman was turned her head backward (who is looking away). I can't see her face. I only can imagine she has a nice face. May be (Maybe) she (is) also
rich woman because she is dressed (in) a fur coat and big white hat with (a) feather.
The woman tucks her black curly hair at the nape under the hat.

In description was said about an old lady (The description said it is an old lady) but I don't see her.
After a huge (lot of) effort I finally saw that old lady. She is dressed (in) the
same fur coat and a white hat but them (the two women) seem different because
there are cover the old lady's face (the old lady's face is covered not sure if this is what you mean?). The young woman's necklace
turned to (becomes) the old lady's mouth. Young chin turned to the old nous. (The young chin becomes the old nose) Eye and
ear turned to the two eyes. (The eye and ear become the two eyes) The old lady looks in sad mood (appears to be sad).

Finally, even though, (delete comma) on (in) the image there are two characters, my eyes prefer
to see only the one young lady.

Good job! Unfortunately, I still cannot see the old lady so I'll have to look harder like you did!