The air puff test is one of the most familiar parts of an eye exam. It measures intraocular pressure, which is an important glaucoma risk factor. However, eye pressure is only one part of a complete glaucoma evaluation. Some people with elevated pressure never develop glaucoma, while others experience optic nerve damage even when their pressure falls within a normal range.
 

At Nolo Eye Care + Eyewear Gallery, we use advanced retinal OCT imaging to examine structures that an eye pressure reading cannot measure. This technology helps us provide more detailed preventive eye care for patients in Nolensville.
 

Why Eye Pressure Testing Is Not Enough

Glaucoma is a group of eye diseases that damages the optic nerve, which carries visual information from the eye to the brain. The condition often progresses slowly and may not cause noticeable symptoms until permanent vision loss has occurred.
 

An air puff test estimates the pressure inside the eye. Elevated pressure may increase glaucoma risk, but a single pressure measurement cannot show whether optic nerve tissue has already changed. Eye pressure can also fluctuate at different times, making it important to consider the result alongside the patient’s medical history, optic nerve appearance, visual field, corneal thickness, and other findings.
 

What Is Retinal OCT Imaging?

Optical coherence tomography, commonly called OCT, is a noninvasive imaging technology that uses light to produce detailed cross-sectional views of the retina. It allows us to examine individual retinal layers and structures around the optic nerve in much greater detail than a surface-level view alone.
 

For glaucoma screening and monitoring, OCT can measure the retinal nerve fiber layer. These nerve fibers connect to the optic nerve and may become thinner as glaucoma develops. Nolo Eye Care uses OCT as part of its advanced diagnostic approach to identifying and managing glaucoma and other retinal conditions in Nolensville.
 

The scan is quick and does not use radiation. Patients look into the instrument while images are captured. The results can then be reviewed and saved for comparison with future scans.
 

What Can an OCT Scan Show?

Retinal OCT provides objective measurements that help our eye doctor evaluate optic nerve health. It may reveal:
 

• Thinning within the retinal nerve fiber layer
• Differences between the right and left eyes
• Structural changes near the optic nerve
• Areas that require closer monitoring
• Changes that may not yet affect central vision
• Progression when current images are compared with earlier scans

OCT findings do not diagnose glaucoma by themselves. Image quality, individual anatomy, prescription, and other eye conditions can influence the results. We interpret OCT imaging alongside eye pressure testing, a dilated retinal examination, visual field testing, and other appropriate evaluations.
 

Establishing a Baseline for Future Comparison

One of the most valuable benefits of advanced retinal OCT is the ability to establish a baseline. A single scan provides detailed information about the current condition of the retina and optic nerve. Repeating the scan when recommended allows us to look for subtle changes over time.
 

This comparison can be especially important because glaucoma is usually a progressive disease. Small differences between visits may help us determine whether the optic nerve appears stable or whether additional testing, closer monitoring, or treatment should be considered.
 

The frequency of OCT imaging depends on each patient’s findings and risk level. Someone with a healthy baseline may need periodic screening, while a patient with suspicious optic nerves, elevated pressure, or diagnosed glaucoma may require more frequent monitoring.
 

Who Has a Higher Risk of Glaucoma?

Glaucoma can affect anyone, but risk generally increases with age. Family history, certain racial or ethnic backgrounds, diabetes, previous eye injuries, high eye pressure, thin corneas, and long-term corticosteroid use may also influence risk.
 

Patients in Nolensville should not wait for vision changes before scheduling an exam. Comprehensive eye exams at Nolo Eye Care include screenings for glaucoma and retinal concerns, helping us detect problems that may be developing without obvious symptoms.
 

Schedule a comprehensive eye exam and ask about advanced retinal OCT imaging at Nolo Eye Care + Eyewear Gallery, located at 7180 Nolensville Road, Suite 1E, Nolensville, TN 37135. Call (615) 283-7321.