diff --git a/packages/effect-lens/src/Lens.ts b/packages/effect-lens/src/Lens.ts
index b5ddd94..d7faf36 100644
--- a/packages/effect-lens/src/Lens.ts
+++ b/packages/effect-lens/src/Lens.ts
@@ -129,6 +129,49 @@ export const makeLazy = <A, ER, EW, RR, RW>(
 ): Lens<A, ER, EW, RR, RW> => new LensLazyImpl(source)
 
 
+export declare namespace SynchronizedRefLensImpl {
+    export interface SynchronizedRefWithInternals<in out A>
+    extends SynchronizedRef.SynchronizedRef<A> {
+        readonly ref: Ref.Ref<A>
+        readonly withLock: <A1, E1, R1>(self: Effect.Effect<A1, E1, R1>) => Effect.Effect<A1, E1, R1>
+    }
+}
+
+export class SynchronizedRefLensImpl<in out A>
+extends Pipeable.Class() implements LensWithInternals<A, never, never, never, never> {
+    readonly [Readable.TypeId]: Readable.TypeId = Readable.TypeId
+    readonly [Subscribable.TypeId]: Subscribable.TypeId = Subscribable.TypeId
+    readonly [LensTypeId]: LensTypeId = LensTypeId
+    readonly [LensWithInternalsTypeId]: LensWithInternalsTypeId = LensWithInternalsTypeId
+
+    readonly ref: SynchronizedRefLensImpl.SynchronizedRefWithInternals<A>
+
+    constructor(
+        ref: SynchronizedRef.SynchronizedRef<A>
+    ) {
+        super()
+        this.ref = ref as SynchronizedRefLensImpl.SynchronizedRefWithInternals<A>
+    }
+
+    get get() { return this.ref.get }
+    get changes() { return Stream.unwrap(Effect.map(this.ref.get, Stream.make)) }
+    update(a: A) { return Ref.set(this.ref.ref, a) }
+    get withLock() { return this.ref.withLock }
+
+    modifyEffect = modifyEffect
+}
+
+/**
+ * Creates a `Lens` that proxies a `SynchronizedRef`.
+ *
+ * Note: since `SynchronizedRef` does not provide any kind of reactivity mechanism, the produced `Lens` will be non-reactive.
+ * This means its `changes` stream will only emit the current value once when evaluated and nothing else.
+ */
+export const fromSynchronizedRef = <A>(
+    ref: SynchronizedRef.SynchronizedRef<A>
+): Lens<A, never, never, never, never> => new SynchronizedRefLensImpl(ref)
+
+
 export declare namespace SubscriptionRefLensImpl {
     export interface SubscriptionRefWithInternals<in out A>
     extends SubscriptionRef.SubscriptionRef<A> {
@@ -175,23 +218,6 @@ export const fromSubscriptionRef = <A>(
 ): Lens<A, never, never, never, never> => new SubscriptionRefLensImpl(ref)
 
 
-/**
- * Creates a `Lens` that proxies a `SynchronizedRef`.
- *
- * Note: since `SynchronizedRef` does not provide any kind of reactivity mechanism, the produced `Lens` will be non-reactive.
- * This means its `changes` stream will only emit the current value once when evaluated and nothing else.
- */
-export const fromSynchronizedRef = <A>(
-    ref: SynchronizedRef.SynchronizedRef<A>
-): Lens<A, never, never, never, never> => make({
-    get get() { return ref.get },
-    get changes() { return Stream.unwrap(Effect.map(ref.get, Stream.make)) },
-    modify: <B, E1 = never, R1 = never>(
-        f: (a: A) => Effect.Effect<readonly [B, A], E1, R1>
-    ) => ref.modifyEffect(f),
-})
-
-
 /**
  * Flattens an effectful `Lens`.
  */