Bedbug nymps are smaller in size than the adults are, but are also visible to the naked eye. If you have bedbugs infesting a bed, you are very likely to see them if you turn or move your mattress
Bed bug eggs may be the most difficult to see with the naked eyes. These eggs are normally pearl-white and have an oval shape with a length of about 1/16 inches. As they continue to grow, you will notice an eye spot emerging from their heads.
Acanthamoeba. You might pick up this bug, which can burrow into your eye and cause an infection called Acanthamoeba keratitis. Symptoms include redness, a feeling that something's in your eye, and sensitivity to light. If it isn't treated, you could lose your sight. It's most common among contact lens wearers, but anyone can get the bug.
There's no question that the thought of bed bugs makes many people's skin crawl, mostly because they can be difficult to see. While they are small pests that can cause a big problem, many people ask me whether you can actually see bed bugs with the naked eye.
Can you see bed bugs well enough to remove them? Even if you can see bed bugs with your 20/20 vision, you can't expect to see them all. Bed bugs hide in crevices and corners, so when you go hunting for them, it is important that you don't rely on your naked eyes in order to find them.
Despite adult bed bugs' small size, at a length of 4 to 7 mm long, you can see bed bugs with the naked eye. Tan, brown, or red in colour, these pests are typically oval shaped and flat. Nymphs and eggs are a bit smaller and harder to see, since they are usually about the size of a pinhead.