Mark R. Mandel, MD

Mark R. Mandel, MD has been selected by hundreds of eye doctors and other physicians to perform LASIK, corneal transplant, and cataract surgery on themselves, their families, and their office staff.

Mark R. Mandel, MD

As a sub-specialist Dr. Mandel has performed over 70,000 LASIK procedures and 20,000 cataract/IOL procedures. He has been serving Bay Area patients since 1983.

Mark R. Mandel, MD

We are proud to offer state of the art technology for measuring the eye and performing the latest in advanced surgical techniques… always striving to achieve the best possible outcomes.

Mark R. Mandel, MD

Graduate of Oxford University, UCLA School of Medicine, Fellowship trained cornea transplant and refractive specialist. Chosen by more surgeons to perform surgery on themselves and their families.


What Diabetes Can Do to Your Eyes

How diabetes affects your eyes

Despite the detrimental effect diabetes can have on ocular health, many people with diabetes are unaware of their risk. The American Academy of Ophthalmology recognizes November as “Diabetic Eye Disease Awareness Month” in an effort to familiarize the public with what diabetes can do to the eyes. Mark Mandel, MD, would like to join the AAO’s efforts and help make you aware of what diabetes can do to your eyes.

Glaucoma and Cataracts

If you have diabetes, you are statistically more likely to develop vision-stealing conditions like glaucoma or cataracts than people that do not have diabetes, even if you are younger than the average glaucoma or cataract  patient. Both of these conditions have the potential to lead to serious vision loss and blindness.

Diabetic Retinopathy

Diabetes also raises the risk of damage to the retina, or the light-sensitive tissue that lines the back wall of your eye. Damage to the retina caused by diabetes is called diabetic retinopathy.

Uncontrolled levels of sugar in your blood can damage the tiny blood vessels that nourish the retina, causing them to swell or leak blood or fluid. In the most advanced cases of diabetic retinopathy, new, abnormal blood vessels can grow in the retina and the vitreous, or the clear gel that fills the interior of the eye. These abnormal blood vessels can rupture and bleed. They may cause scar tissue to develop, which can pull on the retina and separate it from its normal position (i.e., retinal detachment).

Sometimes the abnormal retinal blood vessels leak blood and fluid into the macula, or the central portion of the retina that is responsible for clear central and detailed vision. This complication is known as diabetic macular edema, and can lead to a significant loss of central vision.

Early Detection Is Key

In many cases, diabetic eye conditions do not cause noticeable symptoms until they have progressed considerably. The best way to be diligent and detect problems in their early stages, when they are more easily controlled, is through comprehensive eye exams with an ophthalmologist. Ideally, anyone with diabetes should have annual eye exams to check for problems that may otherwise go unnoticed.

If you have diabetes but it’s been awhile since your last eye exam, Dr. Mandel suggests you schedule an appointment with your regular optometrist or ophthalmologist. Or, for general questions, you can email Dr. Mandel.

Sarah Lee shares her successful LASIK experience. Click below to enjoy her video.

Physicians and patients have traveled from all over the world to Mark R. Mandel, MD

If you would like to meet with Dr. Mandel to discuss your personal vision needs, please contact our office today to schedule a consultation.

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Laser Refractive Surgeries

Laser refractive surgery corrects focusing errors of the eye (e.g., nearsightedness, farsightedness, astigmatism) in order to improve visual sharpness and clarity. Procedures include LASIK, laser cataract surgery and refractive lens exchange.


Premium Cataract Surgery

At Optima Eye we offer premium cataract surgery. Patients can opt for laser cataract surgery and / or premium intraocular lens implants, with several options to fit your unique lifestyle.


Complete Eye Care

Dr. Mandel and his team of professionals offer a complete continuum of general eye care services to accommodate every patient’s needs — whether those needs are as simple as a routine eye exam, or as complex as laser vision correction.


Dry Eye Treatment

Dry eye syndrome, which affects more than 100 million people worldwide, can be painful and debilitating. Dr. Mandel uses several approaches to treat dry eye, ranging from medication to punctal plugs.


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Hayward Location

1237 B Street
Hayward, CA 94541

San Jose Location

455 O’Connor Drive, Suite 360
San Jose, CA 95128

Castro Valley Location

20400 Lake Chabot Road, Suite 302
Castro Valley, CA 94546

Concord Location

1401 Willow Pass Rd., Suite 100
Concord, CA 94520
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