Comment by drcode

Keep in mind ML models are really great at cheating to get answers: Maybe it's detecting that women have to tilt their head up more to reach the retinal photography machine, because they're shorter on average. Maybe, some of the images come from an optometrist that specializes in women's glass frames, and his retinal photography machine has a slightly dimmer bulb. Maybe, men are more likely to get a retinograph only when they have more severe disease already, so the retinas look different for that reason.