Communicating With a Blind or Low-Vision Customer
Why this matters
A customer who cannot see you cannot read your badge, your shirt, the truck in the driveway, or the estimate you hand them. Everything they know about the visit comes through what you say and what you leave in the house. Get that wrong and the costs are concrete: a customer who falls over a chair your helper moved, a signature on a document nobody read to them, a callback because the new thermostat "does not work" when it simply has buttons in different places. Get it right and you are the contractor they call for the next fifteen years.
Who you are actually talking to
Most people described as blind have some vision. In the United States, "legally blind" means best-corrected acuity of 20/200 or worse in the better eye, or a visual field of 20 degrees or less, so a legally blind customer may read large print held close, see light and shapes, or see clearly only off to the side. "Low vision" is the wider term for sight that glasses cannot correct enough for everyday tasks.
The condition shapes what helps. A customer with macular degeneration, common in older adults, loses the center of their vision: they may walk a hallway well and still be unable to read a number or recognize your face. Glaucoma takes the edges first, so the same customer reads fine and walks into a door you left half open. Diabetic damage can be patchy. You do not need the diagnosis, and you should not ask for it. You need one question answered early, in plain words: "What works best for you, me reading things out, or larger print, or sending it to you?"
Step 1: Introduce yourself at the door, and give them a way to check
Say your name, your company, and why you are there, before they have to ask. "Good morning, it's Dan from the plumbing company, here for the water heater you booked for nine." Then offer verification they can do without seeing anything: "If you'd like to check it's me, call the office on the number you booked with and they'll confirm."
Why it comes first: blind and low-vision customers are targeted by people who knock and claim to be from the utility or a contractor. A customer who cannot see a logo has to take you on your word, and a good customer has been taught not to. Offering the callback yourself tells them you understand that and removes the awkwardness of their asking.
What breaks if you skip it: a cautious customer keeps you on the step for ten minutes, or a trusting one learns that anyone who says the right words gets in. Neither is good for them.
Do not shout. Volume does not help vision loss, and it reads as condescension. Speak to the customer, not to whoever came to the door with them.
Step 2: Narrate what you are doing, especially before a noise or a touch
Tell them what is happening at the points where a sighted person would simply look: when you go into another room, when you are about to start something loud, when you will turn the water or power off, when you need to come past them, and when you leave the room or the house. "I'm going down to the basement now, I'll be about twenty minutes." "In a moment I'm going to cut the old pipe, it will be loud for about thirty seconds."
Why: a sudden saw, an unannounced voice behind them, or a silence that turns out to mean you left all startle a person who cannot see the cause, and a startled customer near a stairway can fall. Narration also lets them follow the job, which is the basis of trusting the bill later.
What breaks if you skip it: the customer talks to an empty room, or does not know the water is off and scalds or floods something trying to use it. Always say when you are leaving and when you are back; the classic failure is the tech who walks out to the truck mid-sentence.
Step 3: Guide only when asked, and do it the standard way
Do not take a blind customer's arm, and never steer them by the cane. If they want help across the house, offer: "Would you like my arm?" The standard method, taught in orientation and mobility training, is called sighted guide: they hold your arm just above the elbow, you walk about half a step ahead, and they follow your body. Pause before steps and say "two steps down," before a door and say which way it opens, and before a narrow gap so they can step behind you.
A guide dog is working. Do not pet it, feed it, call it, or make eye contact games with it, because a distracted dog can walk its handler into something. Ask where the dog will be while you work, and keep tools and open access panels out of the route the two of them use.
What breaks if you skip it: grabbing someone throws off their balance and their sense of where they are, and the fall that follows is yours.
Step 4: Leave every item exactly where it was
This is the step that matters most and the one sighted crews miss. A blind person's home works by memory: the chair is where it has always been, the cabinet doors are shut, the shoes are on the third stair. They walk it at normal speed because nothing moves. Your visit is the one day things move.
Before you move anything, say so, or ask. Take a phone photo of the spot so you can put it back exactly, not approximately. A kitchen chair returned eighteen inches from where it lived is a fall. Three categories cause most of the trouble:
- Doors and drawers left part open. Open or shut, never half. A half-open door is at face height and edge-on, the hardest thing to find with a cane. This includes cabinet doors under a sink, an access panel, and the door to the garage.
- Things on the floor. Tool bags, a drop cloth, the old part, a hose. Keep your footprint against one wall and tell the customer where it is: "My tools are along the left wall of the hallway."
- Things that changed position quietly. The doormat kicked crooked, the trash can moved to reach the shutoff, the phone pushed to the back of the counter.
What breaks if you skip it: the fall happens after you leave, often hours later, and the customer may not connect it to your visit. Their family will.
Step 5: Give them estimates and invoices they can actually read
A signature on a document the customer could not read is weak consent and a likely dispute. Ask which format works, then provide it:
- Large print. 18 point is the common large-print size, in a plain sans-serif font, black on white, left aligned, with no gray text, no shaded table rows and no information carried by color alone. A two-page estimate becomes four pages. That is fine.
- Electronic. Many blind customers use a screen reader, software that reads the screen aloud, on a phone or computer. Emailing a plain-text summary or a properly tagged PDF lets them read it at their own pace and keep it. A scanned image of a paper estimate is unreadable to a screen reader.
- Read aloud. Read every line, not a summary, and read the total, the deposit, the warranty terms and the cancellation terms. If someone else from the household will help them review it, offer to wait or to come back.
For payment, read the amount on the card reader screen aloud before they tap or sign, and when handing back cash, say each bill's denomination as you hand it over. If they need to sign on a screen, put their finger on the start of the signature line and tell them its length.
If you are not sure the customer understood what they agreed to, that is a capacity question, not a vision one. See related: Capacity to Contract: The Signs and What to Do.
A note on the law, briefly. The ADA's effective-communication rule for businesses (28 CFR 36.303) requires public accommodations to provide auxiliary aids such as large print or accessible electronic formats. How far it reaches into a service visit in a private home is a question for your attorney, not this article. The practices above meet it either way, so you do not need the answer to do the right thing.
Step 6: Hand back a house they can run
Before you leave, walk the customer through anything that changed. "The new shutoff is in the same place, but it's a lever now instead of a round handle, a quarter turn to the right closes it. Do you want to feel it?" Let them touch the control with you there. A new thermostat with a different button layout is the most common callback in this situation; tactile bump dots on the key buttons help, and the full method is in the sibling on accessible controls.
Then name, out loud, every item you moved and that it is back. This doubles as your own check.
Worked example: a water heater swap for a customer with central vision loss
Mrs. Ortiz is 78, lives alone, and has macular degeneration. She booked a water heater replacement by phone. The office noted "customer is low vision, prefers phone calls, no texts."
At the door, the tech gives his name and company and offers the callback. She takes it, calls the office from the hallway, and lets him in two minutes later. He asks what format works for paperwork; she says large print, and her daughter will read the email copy that evening.
During the job, he narrates the three loud stages (cutting the old supply lines, the drain-down, the strap removal) and the two utility changes: the water off for about two hours, the gas valve to the heater closed during the swap. He tells her the hot water will take about an hour to recover after the restart and asks her not to run the hot tap before he says so.
Moved items. He lists them as he goes, with a photo of each spot: the kitchen chair (moved to clear the path to the garage door), the doormat at the garage entry, and the recycling bin beside the heater. That is three.
Paperwork. The estimate was 2 pages in regular print and 4 pages at 18 point. He reads every line aloud, including the haul-away of the old tank and the warranty term, and she signs on the large-print copy. The email copy goes to the address she gives him.
Close-out, and the catch. On his walk-through he names the three items. She says, "And the door to the garage?" It is standing half open; his helper propped it for the dolly and nobody counted it, because it was not "moved." It goes on the list as item four, shut, and he tells her it is shut.
What would have changed the answer: if she had told him she uses a screen reader, he would have emailed the estimate before reading it aloud so she could follow along, and kept the large print as a backup rather than the main copy. If her daughter had been present, he would still have addressed Mrs. Ortiz and had her sign; the daughter is help, not the customer, unless she holds a power of attorney. See related: Working With a Power of Attorney or Guardian.
How to verify you got this right
Three checks before you pull out of the driveway, each with an observable answer:
- The moved-item list matches the returned-item list, item for item, and the customer has heard both. In the example that was four, not the three on the first list.
- The customer can tell you, in their own words, what was done and what they owe. If they repeat the total back correctly, the paperwork worked. If they cannot, read it again or arrange a call with whoever helps them.
- The document they keep is one they can read in the format they asked for, and you know where it went.
In the job record, note the format preference so the next tech and the office get it right the first time: "Low vision. Large print 18 pt or email. Phone, not text. Wants callback verification at door."
References
- U.S. Department of Justice, ADA Title III regulation, effective communication, 28 CFR 36.303
- American Foundation for the Blind, guidance on sighted guide technique and large-print formatting
- See related: Speaking With an Elderly or Anxious Customer
- See related: Installing Controls a Customer Can Actually Reach and Read
- See related: Capacity to Contract: The Signs and What to Do