Author

Thomas McDonald

Thomas McDonald is a staff writer at Biology Insights with a focus on everyday vision and eye health. Based in Stowe, Vermont, he spent years writing optical consumer pieces for regional publications. McDonald uses his own experience as a lifelong eyeglasses wearer to explain prescription options and lens care.

What Is Considered Legally Blind Without Glasses?
How Long Can You Leave Contacts in Your Eyes?
What Eye Power Is Considered Legally Blind?
How Long Can You Wear the Same Contacts?
What Happens If You Keep Your Eyes Closed for Too Long?
What Is a Normal Cylinder (CYL) in an Eye Prescription?
What Is Better Vision Than 20/20? Defining Superior Vision
Is Getting Hair in Your Eye Dangerous?
How to Know If Your Contacts Are in the Wrong Eye
How Nearsighted Is Considered Legally Blind?
Does a Child With 20/30 Vision Need Glasses?
Do Astigmatism Contacts Have Lines?
How Long Does It Take for Dilation Drops to Wear Off?
How to Tell Which Contact Goes in Which Eye
Why Do I Have Eyelashes in the Corner of My Eye?
Why Is My Vision Blurry After Taking Off Glasses?
What Happens If I Get Mascara in My Eye?
Do Colored Contacts Affect Your Vision?
What Happens If Sunscreen Gets in Your Eyes?
If I Don’t Wear My Glasses, Will My Vision Get Worse?
What Does DVA Mean on an Eye Prescription?
How Long Does It Take to Get Used to Contacts for Astigmatism?
Do Your Eyes Have to Adjust to a New Prescription?
How to Safely Get a Piece of Hair Out of Your Eye
Why Is There a Line on My Contact Lens?
Do I Really Need Glasses With a -0.5 Prescription?
Why Do My Eyes Swell Up When I Cry?
Can Wearing Safety Glasses Affect Eyesight?
25/25 Vision: What It Is and How It Compares to 20/20
Can Glasses Help With Floaters?