This is normal. Your nails are made up of keratin, which is naturally translucent. If the free edge of your nails is opaque white, this means your nails are dry. The whiter they are, the dryer they are. It is normal to have translucent free edges.
Although, if your nails have frequent contact with water, the water can absorb into your nails and strip them of natural oils, causing them to become more translucent-white than opaque-white. This will eventually go away in time, so long you refrain from frequent hand-washing and things like nail polish remover. Acetone or acetone-free, nail polish removers can also strip your nails of their natural oils, causing them to be translucent.
So long you haven't abused your nails, you're perfectly healthy!